diff --git a/advancedmegamenu.php b/advancedmegamenu.php
index b4817dc..a0e0239 100644
--- a/advancedmegamenu.php
+++ b/advancedmegamenu.php
@@ -144,7 +144,8 @@ class AdvancedMegaMenu extends Module implements WidgetInterface
         $output = $this->postProcess();
 
         $this->context->controller->addCSS($this->_path . 'views/css/admin.css');
-        $this->context->controller->addJS($this->_path . 'views/js/admin.js');
+        $adminJsPath = $this->getLocalPath() . 'views/js/admin.js';
+        $this->context->controller->addJS($this->_path . 'views/js/admin.js?v=' . (is_file($adminJsPath) ? (string) filemtime($adminJsPath) : (string) time()));
 
         $languages = $this->context->controller->getLanguages();
         $repository = new MenuRepository(Db::getInstance(), $this);
@@ -155,7 +156,7 @@ class AdvancedMegaMenu extends Module implements WidgetInterface
             'advmegamenu_default_lang' => (int) Configuration::get('PS_LANG_DEFAULT'),
             'advmegamenu_tree' => $tree,
             'advmegamenu_ajax_url' => $this->getAdminAjaxUrl(),
-            'advmegamenu_admin_token' => Tools::getAdminTokenLite('AdminModules'),
+            'advmegamenu_admin_token' => $this->getAjaxToken(),
         ]);
 
         return $output . $this->display(__FILE__, 'views/templates/admin/configure.tpl');
@@ -197,31 +198,42 @@ class AdvancedMegaMenu extends Module implements WidgetInterface
             return '';
         }
 
+        $menuCssFile = $this->getLocalPath() . 'views/css/megamenu.css';
+        $menuJsFile = $this->getLocalPath() . 'views/js/megamenu.js';
+
         $controller->registerStylesheet(
             'module-advancedmegamenu-front',
             $this->_path . 'views/css/megamenu.css',
-            ['media' => 'all', 'priority' => 150]
+            [
+                'media' => 'all',
+                'priority' => 150,
+                'version' => is_file($menuCssFile) ? (string) filemtime($menuCssFile) : $this->version,
+            ]
         );
         $controller->registerJavascript(
             'module-advancedmegamenu-front',
             $this->_path . 'views/js/megamenu.js',
-            ['position' => 'bottom', 'priority' => 150]
+            [
+                'position' => 'bottom',
+                'priority' => 150,
+                'version' => is_file($menuJsFile) ? (string) filemtime($menuJsFile) : $this->version,
+            ]
         );
 
         $spriteCssFile = $this->getLocalPath() . 'views/css/generated/menu-sprite.css';
         if (is_file($spriteCssFile)) {
             $spriteCssUrl = $this->_path . 'views/css/generated/menu-sprite.css';
-            $spriteImageFile = $this->getLocalPath() . 'views/img/generated/menu-sprite.webp';
+            $spriteImageFile = $this->getCurrentSpriteImageFile($spriteCssFile);
             $controller->registerStylesheet(
                 'module-advancedmegamenu-sprite',
                 $spriteCssUrl,
-                ['media' => 'all', 'priority' => 151]
+                ['media' => 'all', 'priority' => 151, 'version' => (string) filemtime($spriteCssFile)]
             );
 
             $preloadLinks = [];
 
-            if (is_file($spriteImageFile)) {
-                $spriteImageUrl = $this->_path . 'views/img/generated/menu-sprite.webp?v=' . (string) filemtime($spriteImageFile);
+            if ($spriteImageFile && is_file($spriteImageFile)) {
+                $spriteImageUrl = $this->_path . 'views/img/generated/' . basename($spriteImageFile);
                 $preloadLinks[] = '<link rel="preload" href="' . htmlspecialchars($spriteImageUrl, ENT_QUOTES, 'UTF-8') . '" as="image" type="image/webp">';
             }
 
@@ -406,15 +418,22 @@ class AdvancedMegaMenu extends Module implements WidgetInterface
     private function assertAdminToken(): void
     {
         $token = (string) Tools::getValue('token');
-        $expectedToken = Tools::getAdminTokenLite('AdminModules');
+        $validTokens = array_filter([
+            $this->getAjaxToken(),
+            Tools::getAdminTokenLite('AdminModules'),
+        ]);
 
-        if (!hash_equals($expectedToken, $token)) {
-            header('Content-Type: application/json', true, 403);
-            exit(json_encode([
-                'error' => true,
-                'message' => $this->trans('Invalid admin token.', [], 'Modules.Advancedmegamenu.Admin'),
-            ]));
+        foreach ($validTokens as $validToken) {
+            if (hash_equals((string) $validToken, $token)) {
+                return;
+            }
         }
+
+        header('Content-Type: application/json', true, 403);
+        exit(json_encode([
+            'error' => true,
+            'message' => $this->trans('Invalid admin token.', [], 'Modules.Advancedmegamenu.Admin'),
+        ]));
     }
 
     private function ajaxSearchProducts(): void
@@ -615,6 +634,28 @@ class AdvancedMegaMenu extends Module implements WidgetInterface
         }, $icons));
     }
 
+    private function getCurrentSpriteImageFile(string $spriteCssFile): string
+    {
+        $css = (string) @file_get_contents($spriteCssFile);
+        if (preg_match('#img/generated/([^")]+\.webp)#', $css, $matches)) {
+            $spriteImageFile = $this->getLocalPath() . 'views/img/generated/' . basename($matches[1]);
+            if (is_file($spriteImageFile)) {
+                return $spriteImageFile;
+            }
+        }
+
+        $spriteFiles = glob($this->getLocalPath() . 'views/img/generated/menu-sprite*.webp') ?: [];
+        if (empty($spriteFiles)) {
+            return '';
+        }
+
+        usort($spriteFiles, static function (string $left, string $right): int {
+            return filemtime($right) <=> filemtime($left);
+        });
+
+        return (string) $spriteFiles[0];
+    }
+
     /**
      * @param array<string, mixed> $node
      *
@@ -970,6 +1011,13 @@ class AdvancedMegaMenu extends Module implements WidgetInterface
         ]);
     }
 
+    private function getAjaxToken(): string
+    {
+        $employeeId = isset($this->context->employee) ? (int) $this->context->employee->id : 0;
+
+        return Tools::hash($this->name . '|ajax|' . $employeeId);
+    }
+
     private function buildModuleImageUrl(string $path): string
     {
         return rtrim($this->getPathUri(), '/') . '/views/img/' . ltrim($path, '/');
diff --git a/src/Classes/SpriteGenerator.php b/src/Classes/SpriteGenerator.php
index e81c951..5a0e6ec 100644
--- a/src/Classes/SpriteGenerator.php
+++ b/src/Classes/SpriteGenerator.php
@@ -22,7 +22,6 @@ class SpriteGenerator
     {
         $imageOutputDir = $this->moduleDir . '/views/img/generated';
         $cssOutputDir = $this->moduleDir . '/views/css/generated';
-        $spritePath = $imageOutputDir . '/menu-sprite.webp';
         $cssPath = $cssOutputDir . '/menu-sprite.css';
 
         if (!is_dir($imageOutputDir)) {
@@ -34,7 +33,7 @@ class SpriteGenerator
         }
 
         if (empty($icons)) {
-            $this->cleanup($spritePath, $cssPath);
+            $this->cleanup($imageOutputDir, $cssPath);
 
             return;
         }
@@ -77,7 +76,7 @@ class SpriteGenerator
         }
 
         if (empty($images) || $totalWidth === 0 || $maxHeight === 0) {
-            $this->cleanup($spritePath, $cssPath);
+            $this->cleanup($imageOutputDir, $cssPath);
 
             return;
         }
@@ -101,22 +100,37 @@ class SpriteGenerator
             );
         }
 
-        $spriteWritten = imagewebp($sprite, $spritePath, 85);
+        $tmpSpritePath = $imageOutputDir . '/menu-sprite.tmp.webp';
+        $spriteWritten = imagewebp($sprite, $tmpSpritePath, 85);
         imagedestroy($sprite);
 
-        if (!$spriteWritten || !is_file($spritePath)) {
+        if (!$spriteWritten || !is_file($tmpSpritePath)) {
             foreach ($images as $iconImage) {
                 imagedestroy($iconImage['resource']);
             }
 
-            $this->cleanup($spritePath, $cssPath);
+            $this->cleanup($imageOutputDir, $cssPath);
+
+            return;
+        }
+
+        $hash = substr((string) sha1_file($tmpSpritePath), 0, 16);
+        $spriteFilename = 'menu-sprite-' . $hash . '.webp';
+        $spritePath = $imageOutputDir . '/' . $spriteFilename;
+
+        if (!rename($tmpSpritePath, $spritePath)) {
+            @unlink($tmpSpritePath);
+            foreach ($images as $iconImage) {
+                imagedestroy($iconImage['resource']);
+            }
+
+            $this->cleanup($imageOutputDir, $cssPath);
 
             return;
         }
 
-        $version = is_file($spritePath) ? (string) filemtime($spritePath) : (string) time();
         $css = [];
-        $css[] = '.adv-megamenu__icon{display:inline-block;background-repeat:no-repeat;background-image:url("../../img/generated/menu-sprite.webp?v=' . $version . '");}';
+        $css[] = '.adv-megamenu__icon{display:inline-block;background-repeat:no-repeat;background-image:url("../../img/generated/' . $spriteFilename . '");}';
 
         foreach ($images as $iconImage) {
             $css[] = sprintf(
@@ -132,15 +146,17 @@ class SpriteGenerator
         file_put_contents($cssPath, implode(PHP_EOL, $css) . PHP_EOL);
     }
 
-    private function cleanup(string $spritePath, string $cssPath): void
+    private function cleanup(string $imageOutputDir, string $cssPath): void
     {
-        if (is_file($spritePath)) {
-            unlink($spritePath);
-        }
-
         if (is_file($cssPath)) {
             unlink($cssPath);
         }
+
+        foreach (glob($imageOutputDir . '/menu-sprite*.webp') ?: [] as $spritePath) {
+            if (is_file($spritePath)) {
+                unlink($spritePath);
+            }
+        }
     }
 
     /**
diff --git a/views/css/admin.css b/views/css/admin.css
index e9eac7c..41b8510 100644
--- a/views/css/admin.css
+++ b/views/css/admin.css
@@ -211,6 +211,19 @@
   border: 1px solid #edf1f4;
 }
 
+.adv-menu-image-preview-wrap {
+  display: inline-flex;
+  flex-direction: column;
+  align-items: flex-start;
+  gap: 0.5rem;
+}
+
+.adv-menu-image-remove {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.35rem;
+}
+
 .adv-menu-admin-node__collections {
   display: grid;
   gap: 1rem;
diff --git a/views/css/megamenu.css b/views/css/megamenu.css
index cb81be4..351396e 100644
--- a/views/css/megamenu.css
+++ b/views/css/megamenu.css
@@ -569,6 +569,31 @@
   font-weight: 700;
 }
 
+.adv-megamenu .adv-megamenu__mobile-title-link,
+.adv-megamenu .adv-megamenu__mobile-title-link:link,
+.adv-megamenu .adv-megamenu__mobile-title-link:visited {
+  display: inline-flex;
+  align-items: center;
+  justify-content: flex-end;
+  gap: 0.25rem;
+  min-width: 0;
+  color: #8a3c1f;
+  font-weight: 600;
+  line-height: 1.25;
+  text-align: right;
+  text-decoration: none;
+}
+
+.adv-megamenu__mobile-title-link .material-icons {
+  flex: 0 0 auto;
+  font-size: 1.125rem;
+}
+
+.adv-megamenu .adv-megamenu__mobile-title-link:hover,
+.adv-megamenu .adv-megamenu__mobile-title-link:focus-visible {
+  color: #8a3c1f;
+}
+
 .adv-megamenu__mobile-viewport {
   position: relative;
   height: calc(100% - 56px);
diff --git a/views/js/admin.js b/views/js/admin.js
index c2c353c..c9f5f48 100644
--- a/views/js/admin.js
+++ b/views/js/admin.js
@@ -458,7 +458,12 @@
       var rootHint = nodeModal.querySelector('.js-node-root-hint');
       var imageGroup = nodeModal.querySelector('.js-node-image-group');
       var previewWrap = nodeModal.querySelector('.js-node-icon-preview');
-      renderImagePreview(previewWrap, depth > 0 ? node.icon_url : '');
+      renderImagePreview(previewWrap, depth > 0 ? node.icon_url : '', function () {
+        node.icon_path = '';
+        node.icon_url = '';
+        renderImagePreview(previewWrap, '');
+        serializeTree();
+      });
 
       rootHint.style.display = depth === 0 ? 'block' : 'none';
       rootHint.textContent = t('rootOnlyHint', 'For first-level items only title and custom link are edited here.');
@@ -473,7 +478,12 @@
         uploadImage(event.target.files[0], 'menu_icon', function (response) {
           node.icon_path = response.path;
           node.icon_url = response.url;
-          renderImagePreview(previewWrap, response.url);
+          renderImagePreview(previewWrap, response.url, function () {
+            node.icon_path = '';
+            node.icon_url = '';
+            renderImagePreview(previewWrap, '');
+            serializeTree();
+          });
           serializeTree();
         }, {
           menuDepth: depth,
@@ -572,7 +582,13 @@
       layoutModal.querySelector('.js-layout-type').value = layout.block_type || 'promo';
       layoutModal.querySelector('.js-layout-title').checked = !!layout.show_title;
       layoutModal.querySelector('.js-layout-bg').value = layout.background_color || '';
-      renderImagePreview(layoutModal.querySelector('.js-layout-preview'), layout.custom_image_url);
+      var layoutPreviewWrap = layoutModal.querySelector('.js-layout-preview');
+      renderImagePreview(layoutPreviewWrap, layout.custom_image_url, function () {
+        layout.custom_image = '';
+        layout.custom_image_url = '';
+        renderImagePreview(layoutPreviewWrap, '');
+        serializeTree();
+      });
       renderProducts(layout.products, layoutModal.querySelector('.js-layout-products'));
       layoutModal.querySelector('.js-layout-product-results').innerHTML = '';
       layoutModal.querySelector('.js-layout-product-search').value = '';
@@ -583,7 +599,12 @@
         uploadImage(event.target.files[0], 'layout_image', function (response) {
           layout.custom_image = response.path;
           layout.custom_image_url = response.url;
-          renderImagePreview(layoutModal.querySelector('.js-layout-preview'), response.url);
+          renderImagePreview(layoutPreviewWrap, response.url, function () {
+            layout.custom_image = '';
+            layout.custom_image_url = '';
+            renderImagePreview(layoutPreviewWrap, '');
+            serializeTree();
+          });
           serializeTree();
         });
       };
@@ -678,16 +699,30 @@
       showModal(confirmModal);
     }
 
-    function renderImagePreview(wrap, url) {
+    function renderImagePreview(wrap, url, onRemove) {
       wrap.innerHTML = '';
       if (!url) {
         return;
       }
 
+      var preview = document.createElement('div');
+      preview.className = 'adv-menu-image-preview-wrap';
+
       var image = document.createElement('img');
       image.src = url;
       image.className = 'adv-menu-image-preview';
-      wrap.appendChild(image);
+      preview.appendChild(image);
+
+      if (typeof onRemove === 'function') {
+        var removeButton = document.createElement('button');
+        removeButton.type = 'button';
+        removeButton.className = 'btn btn-default btn-sm adv-menu-image-remove';
+        removeButton.innerHTML = '<i class="icon-trash"></i><span>' + escapeHtml(t('removeImage', 'Remove image')) + '</span>';
+        removeButton.addEventListener('click', onRemove);
+        preview.appendChild(removeButton);
+      }
+
+      wrap.appendChild(preview);
     }
 
     function getNodeTitle(node) {
@@ -727,9 +762,6 @@
 
       var uploadOptions = options || {};
       var formData = new FormData();
-      formData.append('ajax', '1');
-      formData.append('action', 'uploadImage');
-      formData.append('token', token);
       formData.append('preset', preset || 'default');
       if (typeof uploadOptions.menuDepth !== 'undefined') {
         formData.append('menu_depth', String(uploadOptions.menuDepth));
@@ -739,17 +771,26 @@
       }
       formData.append('image', file);
 
-      fetch(ajaxUrl, {
+      fetch(ajaxUrl + '&ajax=1&action=uploadImage&token=' + encodeURIComponent(token), {
         method: 'POST',
         body: formData
       })
         .then(function (response) {
+          if (!response.ok) {
+            throw new Error('Upload failed: HTTP ' + response.status);
+          }
+
           return response.json();
         })
         .then(function (payload) {
           if (payload && !payload.error) {
             callback(payload);
+            return;
           }
+          throw new Error(payload && payload.message ? payload.message : 'Upload failed');
+        })
+        .catch(function (error) {
+          window.alert(error.message || 'Upload failed');
         });
     }
 
diff --git a/views/js/megamenu.js b/views/js/megamenu.js
index 68d0412..a71a0cc 100644
--- a/views/js/megamenu.js
+++ b/views/js/megamenu.js
@@ -219,14 +219,6 @@
       return;
     }
 
-    item.addEventListener('mouseenter', function () {
-      if (!isDesktop()) {
-        return;
-      }
-
-      activateSubmenuPane(item);
-    });
-
     bindDesktopClickIntent(link, function () {
       activateSubmenuPane(item);
     });
diff --git a/views/templates/admin/configure.tpl b/views/templates/admin/configure.tpl
index f83af70..dba8130 100644
--- a/views/templates/admin/configure.tpl
+++ b/views/templates/admin/configure.tpl
@@ -43,6 +43,7 @@
     "description": "{l s='Description' d='Modules.Advancedmegamenu.Admin' js=1}",
     "customLinkLabel": "{l s='Custom link' d='Modules.Advancedmegamenu.Admin' js=1}",
     "iconUpload": "{l s='Item image/icon' d='Modules.Advancedmegamenu.Admin' js=1}",
+    "removeImage": "{l s='Remove image' d='Modules.Advancedmegamenu.Admin' js=1}",
     "rootOnlyHint": "{l s='For first-level items only title and custom link are edited here.' d='Modules.Advancedmegamenu.Admin' js=1}",
     "width": "{l s='Width' d='Modules.Advancedmegamenu.Admin' js=1}",
     "blockType": "{l s='Block type' d='Modules.Advancedmegamenu.Admin' js=1}",
diff --git a/views/templates/hook/megamenu.tpl b/views/templates/hook/megamenu.tpl
index 36241f0..03cdcdc 100644
--- a/views/templates/hook/megamenu.tpl
+++ b/views/templates/hook/megamenu.tpl
@@ -174,7 +174,14 @@
           <button type="button" class="adv-megamenu__mobile-back js-adv-back">
             &lt; {l s='Wstecz' d='Modules.Advancedmegamenu.Shop'}
           </button>
-          <span>{$node.title|escape:'htmlall':'UTF-8'}</span>
+          {if $node.url && $node.url != '#'}
+            <a href="{$node.url|escape:'htmlall':'UTF-8'}" class="adv-megamenu__mobile-title-link" {if $node.new_window}target="_blank" rel="noopener"{/if}>
+              <span>{$node.title|escape:'htmlall':'UTF-8'}</span>
+              <span class="material-icons" aria-hidden="true">arrow_forward</span>
+            </a>
+          {else}
+            <span class="adv-megamenu__mobile-title">{$node.title|escape:'htmlall':'UTF-8'}</span>
+          {/if}
         </div>
         <ul class="adv-megamenu__mobile-list">
           {foreach from=$node.category_branch item=branch}