diff --git a/frontend/dist-electron/main.js b/frontend/dist-electron/main.js
index d62915f..3c52098 100644
--- a/frontend/dist-electron/main.js
+++ b/frontend/dist-electron/main.js
@@ -519,20 +519,60 @@ electron_1.ipcMain.handle('get-server-users', async () => { initBackend(); retur
 electron_1.ipcMain.handle('switch-account', async (event, loginName) => await handleSwitchAccount(loginName));
 electron_1.ipcMain.handle('open-external', (event, url) => electron_1.shell.openExternal(url));
 electron_1.ipcMain.handle('open-steam-app-login', async () => {
-    console.log('[SteamClient] Triggering desktop login window...');
-    // Force Steam to show login window. 
-    // steam://open/login is the protocol for this.
+    console.log('[SteamClient] Preparing for fresh login...');
+    await killSteam();
+    if (process.platform === 'win32') {
+        // Clear auto-login registry
+        const clearReg = 'reg add "HKCU\\Software\\Valve\\Steam" /v AutoLoginUser /t REG_SZ /d "" /f';
+        await new Promise((res) => (0, child_process_1.exec)(clearReg, () => res()));
+    }
+    else if (process.platform === 'linux') {
+        // On Linux we can use the steamClient helper to set an empty user
+        await steam_client_1.steamClient.setAutoLoginUser("", undefined, "");
+    }
     const command = process.platform === 'win32' ? 'start steam://open/login' : 'xdg-open steam://open/login';
     (0, child_process_1.exec)(command);
     return true;
 });
 electron_1.ipcMain.handle('open-steam-login', async (event, expectedSteamId) => {
-    const loginSession = electron_1.session.fromPartition('persist:steam-login');
-    // Removed: automatic clearStorageData to allow cookie persistence
+    // Use a unique partition per account to prevent session bleeding
+    const partitionId = expectedSteamId ? `persist:steam-login-${expectedSteamId}` : 'persist:steam-login-new';
+    const loginSession = electron_1.session.fromPartition(partitionId);
+    // If adding a brand new account, explicitly clear previous trash
+    if (!expectedSteamId) {
+        console.log('[Auth] Clearing session for new account login...');
+        await loginSession.clearStorageData({ storages: ['cookies', 'localstorage', 'indexdb'] });
+    }
+    // If we have an existing cookie string for this account, pre-inject it
+    if (expectedSteamId) {
+        const accounts = store.get('accounts');
+        const account = accounts.find(a => a.steamId === expectedSteamId);
+        if (account?.steamLoginSecure) {
+            console.log(`[Auth] Pre-injecting existing cookies for ${account.personaName}...`);
+            const cookiePairs = account.steamLoginSecure.split(';').map(c => c.trim());
+            for (const pair of cookiePairs) {
+                const [name, value] = pair.split('=');
+                if (name && value) {
+                    try {
+                        await loginSession.cookies.set({
+                            url: 'https://steamcommunity.com',
+                            domain: 'steamcommunity.com',
+                            name: name,
+                            value: value,
+                            path: '/',
+                            secure: true,
+                            httpOnly: name.includes('Secure')
+                        });
+                    }
+                    catch (e) { }
+                }
+            }
+        }
+    }
     return new Promise((resolve) => {
         const loginWindow = new electron_1.BrowserWindow({
             width: 800, height: 700, parent: mainWindow || undefined, modal: true, title: 'Login to Steam',
-            webPreferences: { nodeIntegration: false, contextIsolation: true, partition: 'persist:steam-login' }
+            webPreferences: { nodeIntegration: false, contextIsolation: true, partition: partitionId }
         });
         loginWindow.loadURL('https://steamcommunity.com/login/home/?goto=my/gcpd/730');
         const checkCookie = setInterval(async () => {
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index da19ae8..992350e 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "ultimate-ban-tracker-desktop",
-  "version": "1.0.0",
+  "version": "1.2.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "ultimate-ban-tracker-desktop",
-      "version": "1.0.0",
+      "version": "1.2.0",
       "license": "SEE LICENSE IN LICENSE",
       "dependencies": {
         "@emotion/react": "^11.14.0",
diff --git a/frontend/package.json b/frontend/package.json
index 3529cdb..f20a0c0 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,7 +1,7 @@
 {
   "name": "ultimate-ban-tracker-desktop",
   "description": "Professional Steam Account Manager & Ban Tracker",
-  "version": "1.1.0",
+  "version": "1.2.0",
   "author": "Nils Pukropp <nils@narl.io>",
   "homepage": "https://narl.io",
   "license": "SEE LICENSE IN LICENSE",