diff --git a/package.json b/package.json
index 3b184f3c..c87befb9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "betterseqtaplus",
-  "version": "3.4.16",
+  "version": "3.5.0",
   "type": "module",
   "description": "Enhance SEQTA Learn's usability and aesthetics! A fork of BetterSEQTA to continue development add add heaps more features!",
   "browserslist": "> 0.5%, last 2 versions, not dead",
diff --git a/src/css/injected.scss b/src/css/injected.scss
index c429dc99..b2c408cf 100644
--- a/src/css/injected.scss
+++ b/src/css/injected.scss
@@ -447,6 +447,7 @@ ul.magicDelete > li.deleting {
   background: var(--better-main) !important;
   color: var(--text-color);
   border-right: none;
+  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
 }
 #menu li > label > svg,
 #menu section > label > svg {
@@ -459,9 +460,7 @@ ul.magicDelete > li.deleting {
 body.icon-only-sidebar:not(:has(#menu li.hasChildren.active)) {
   #menu {
     width: 70px !important;
-    min-width: 70px !important;
-    max-width: 70px !important;
-    transition: width 0.2s ease;
+    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
     overflow: hidden !important;
   }
 
@@ -472,6 +471,12 @@ body.icon-only-sidebar:not(:has(#menu li.hasChildren.active)) {
 
   #content {
     left: 70px !important;
+    transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
+  }
+
+  #menu .sub {
+    left: 70px !important;
+    transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
   }
 
   #menu li > label span,
@@ -483,10 +488,6 @@ body.icon-only-sidebar:not(:has(#menu li.hasChildren.active)) {
     display: none !important;
   }
 
-  #menu .sub {
-    left: 70px !important;
-  }
-
   #menu ul li,
   #menu ul section {
     width: 100% !important;
@@ -934,7 +935,7 @@ html.transparencyEffects
 }
 
 #content {
-  transition: 0.4s;
+  transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1), transform 0.4s ease;
   left: 270px;
   background: unset;
 }
diff --git a/src/css/injected/sidebar-animation.scss b/src/css/injected/sidebar-animation.scss
index 51c6a11f..88cb2e2e 100644
--- a/src/css/injected/sidebar-animation.scss
+++ b/src/css/injected/sidebar-animation.scss
@@ -35,7 +35,7 @@
 }
 
 #menu .sub {
-  transition: transform 0.3s ease;
+  transition: transform 0.3s ease, left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
 }
 
 #menu > ul:has(li.hasChildren.active) > li.active {
diff --git a/src/interface/components/store/ThemeModal.svelte b/src/interface/components/store/ThemeModal.svelte
index 5deff576..cb340221 100644
--- a/src/interface/components/store/ThemeModal.svelte
+++ b/src/interface/components/store/ThemeModal.svelte
@@ -29,9 +29,13 @@
 
   // Function to get related themes
   function getRelatedThemes() {
+    if (!theme) return [];
     return allThemes
-      .filter((t: Theme) => t.id !== theme.id)
-      .sort((a: Theme, b: Theme) => a.name.localeCompare(theme.name) - b.name.localeCompare(theme.name))
+      .filter((t: Theme) => !!t && t.id !== theme.id)
+      .sort(
+        (a: Theme, b: Theme) =>
+          a.name.localeCompare(theme.name) - b.name.localeCompare(theme.name),
+      )
       .slice(0, 4);
   }
 
@@ -84,6 +88,7 @@
     onclick={(e) => e.stopPropagation()}
     onkeydown={(e) => e.stopPropagation()}
   >
+    {#if theme}
     <div class="relative h-auto">
       <div class="absolute top-0 right-0 flex gap-1 items-center">
         <button class="p-2 text-xl font-bold text-gray-600 font-IconFamily dark:text-gray-200" onclick={() => hideModal()}>
@@ -166,6 +171,13 @@
         {/each}
       </div>
     </div>
+    {:else}
+      <div class="flex justify-center items-center h-full text-zinc-600 dark:text-zinc-300">
+        <button class="px-4 py-2 rounded-lg bg-zinc-200 dark:bg-zinc-700 transition-all duration-200 hover:scale-105 active:scale-95" onclick={() => hideModal()}>
+          Close
+        </button>
+      </div>
+    {/if}
   </div>
 </div>
 
diff --git a/src/resources/update-video.mp4 b/src/resources/update-video.mp4
deleted file mode 100644
index 95051212..00000000
Binary files a/src/resources/update-video.mp4 and /dev/null differ
diff --git a/src/seqta/utils/Openers/OpenWhatsNewPopup.ts b/src/seqta/utils/Openers/OpenWhatsNewPopup.ts
index 4ed9aa57..73160c72 100644
--- a/src/seqta/utils/Openers/OpenWhatsNewPopup.ts
+++ b/src/seqta/utils/Openers/OpenWhatsNewPopup.ts
@@ -32,6 +32,17 @@ export function OpenWhatsNewPopup() {
   const text = stringToHTML(/* html */ `
     <div class="whatsnewTextContainer" style="height: 50%;overflow-y: auto;">
 
+      <h1>3.5.0 - Adaptive Theme, Timetable Editor & More</h1>
+      <li>Added adaptive theme colour — theme changes based on the current class when viewing courses or assessments</li>
+      <li>Added optional soft gradient for adaptive theme when viewing a class</li>
+      <li>Added timetable editor — edit rooms and teachers directly from the timetable with apply-to-future-weeks option</li>
+      <li>Added icon-only sidebar option for a compact layout</li>
+      <li>Fixed assessment colouring issues</li>
+      <li>Added new kanban categories to the assessments overview</li>
+      <li>Added DesQTA QR code generation in settings for linking to the DesQTA (BetterSEQTA) mobile app</li>
+      <li>New store with improved theme browsing and backgrounds</li>
+      <li>Other minor bug fixes and improvements</li>
+
       <h1>3.4.16 - Subject Averages Fixes</h1>
       <li>Fixed subject averages not showing correctly with letter grades and weighted marks</li>