diff --git a/src/plugins/built-in/globalSearch/src/core/index.ts b/src/plugins/built-in/globalSearch/src/core/index.ts
index adf199c3..c86d9f34 100644
--- a/src/plugins/built-in/globalSearch/src/core/index.ts
+++ b/src/plugins/built-in/globalSearch/src/core/index.ts
@@ -151,6 +151,17 @@ const globalSearchPlugin: Plugin<typeof settings> = {
   run: async (api) => {
     const appRef = { current: null };
 
+    // Check for extension updates and clear caches if needed
+    try {
+      const { checkAndHandleUpdate } = await import("../utils/versionCheck");
+      const wasUpdated = await checkAndHandleUpdate();
+      if (wasUpdated) {
+        console.log("[Global Search] Extension updated - caches cleared");
+      }
+    } catch (error) {
+      console.warn("[Global Search] Failed to check for updates:", error);
+    }
+
     try {
       await IndexedDbManager.create("embeddiaDB", "embeddiaObjectStore", {
         primaryKey: "id",
diff --git a/src/plugins/built-in/globalSearch/src/search/searchUtils.ts b/src/plugins/built-in/globalSearch/src/search/searchUtils.ts
index ed7e72c2..3343e839 100644
--- a/src/plugins/built-in/globalSearch/src/search/searchUtils.ts
+++ b/src/plugins/built-in/globalSearch/src/search/searchUtils.ts
@@ -30,6 +30,21 @@ function setCachedResults(query: string, results: CombinedResult[]) {
   searchCache.set(query, { results, timestamp: Date.now() });
 }
 
+/**
+ * Clears the search result cache
+ */
+export function clearSearchCache(): void {
+  searchCache.clear();
+  console.debug("[Search] Search result cache cleared");
+}
+
+// Listen for cache clear events (e.g., on extension update)
+if (typeof window !== 'undefined') {
+  window.addEventListener('betterseqta-clear-search-cache', () => {
+    clearSearchCache();
+  });
+}
+
 export function createSearchIndexes() {
   const commands = getStaticCommands();
   const dynamicItems = getDynamicItems();
diff --git a/src/plugins/built-in/globalSearch/src/search/vector/vectorSearch.ts b/src/plugins/built-in/globalSearch/src/search/vector/vectorSearch.ts
index 6f45fa6b..59013d60 100644
--- a/src/plugins/built-in/globalSearch/src/search/vector/vectorSearch.ts
+++ b/src/plugins/built-in/globalSearch/src/search/vector/vectorSearch.ts
@@ -60,6 +60,21 @@ function setCachedEmbedding(query: string, embedding: number[]) {
   embeddingCache.set(query, embedding);
 }
 
+/**
+ * Clears the embedding cache
+ */
+export function clearEmbeddingCache(): void {
+  embeddingCache.clear();
+  console.debug("[Vector Search] Embedding cache cleared");
+}
+
+// Listen for cache clear events (e.g., on extension update)
+if (typeof window !== 'undefined') {
+  window.addEventListener('betterseqta-clear-embedding-cache', () => {
+    clearEmbeddingCache();
+  });
+}
+
 export async function searchVectors(
   query: string,
   topK: number = 20,
diff --git a/src/plugins/built-in/globalSearch/src/utils/versionCheck.ts b/src/plugins/built-in/globalSearch/src/utils/versionCheck.ts
new file mode 100644
index 00000000..c3dec89d
--- /dev/null
+++ b/src/plugins/built-in/globalSearch/src/utils/versionCheck.ts
@@ -0,0 +1,106 @@
+import browser from "webextension-polyfill";
+
+const VERSION_STORAGE_KEY = "betterseqta-global-search-version";
+const VERSION_CACHE_KEY = "betterseqta-global-search-cache-version";
+
+/**
+ * Gets the current extension version from the manifest
+ */
+export function getCurrentVersion(): string {
+  try {
+    return browser.runtime.getManifest().version;
+  } catch (e) {
+    console.warn("[Version Check] Failed to get manifest version:", e);
+    return "0.0.0";
+  }
+}
+
+/**
+ * Gets the last stored version from localStorage
+ */
+export function getStoredVersion(): string | null {
+  try {
+    return localStorage.getItem(VERSION_STORAGE_KEY);
+  } catch (e) {
+    console.warn("[Version Check] Failed to get stored version:", e);
+    return null;
+  }
+}
+
+/**
+ * Stores the current version in localStorage
+ */
+export function storeVersion(version: string): void {
+  try {
+    localStorage.setItem(VERSION_STORAGE_KEY, version);
+    localStorage.setItem(VERSION_CACHE_KEY, version);
+  } catch (e) {
+    console.warn("[Version Check] Failed to store version:", e);
+  }
+}
+
+/**
+ * Checks if the extension has been updated and clears caches if needed
+ * Returns true if an update was detected
+ */
+export async function checkAndHandleUpdate(): Promise<boolean> {
+  const currentVersion = getCurrentVersion();
+  const storedVersion = getStoredVersion();
+  
+  // If no stored version, this is first run - store current version
+  if (!storedVersion) {
+    console.debug(`[Version Check] First run detected, storing version ${currentVersion}`);
+    storeVersion(currentVersion);
+    return false;
+  }
+  
+  // If versions match, no update
+  if (storedVersion === currentVersion) {
+    return false;
+  }
+  
+  // Version mismatch detected - extension was updated
+  console.log(`[Version Check] Extension updated from ${storedVersion} to ${currentVersion}, clearing caches...`);
+  
+  // Clear all caches
+  await clearAllCaches();
+  
+  // Store new version
+  storeVersion(currentVersion);
+  
+  return true;
+}
+
+/**
+ * Clears all search-related caches
+ */
+export async function clearAllCaches(): Promise<void> {
+  try {
+    // Clear search result cache (in-memory Map)
+    if (typeof window !== 'undefined') {
+      // Dispatch event to clear caches in other modules
+      window.dispatchEvent(new CustomEvent('betterseqta-clear-search-cache'));
+      window.dispatchEvent(new CustomEvent('betterseqta-clear-embedding-cache'));
+    }
+    
+    // Also try to directly clear caches if modules are already loaded
+    try {
+      const { clearSearchCache } = await import("../search/searchUtils");
+      clearSearchCache();
+    } catch (e) {
+      // Module might not be loaded yet, that's okay
+    }
+    
+    try {
+      const { clearEmbeddingCache } = await import("../search/vector/vectorSearch");
+      clearEmbeddingCache();
+    } catch (e) {
+      // Module might not be loaded yet, that's okay
+    }
+    
+    console.debug("[Version Check] All caches cleared");
+  } catch (e) {
+    console.error("[Version Check] Error clearing caches:", e);
+  }
+}
+