This method works primarily on Windows 11 versions before 25H2. If ViveTool didn't work or you're on an older version, try this registry approach.
Press Win + R to open the Run dialog, type regedit and press Enter. Click "Yes" when prompted by User Account Control.
Navigate to the following registry path:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
Right-click in the right pane, select "New" > "DWORD (32-bit) Value" and name it Start_ShowClassicMode.
Double-click the newly created value, set the "Value data" to 1, ensure "Base" is set to "Hexadecimal", and click "OK".
Restart Windows Explorer without rebooting:
taskkill /f /im explorer.exe && start explorer.exe
Pro tip: Export the registry key before making changes by right-clicking the "Advanced" folder and selecting "Export".
Verification: Open the Start menu to check if the layout has changed. If not, this method may not work on your Windows 11 version.