Follow this guide exactly after opening: Menu>>Window>>Preferences
- Hold down the ALT key. Hit SPACEBAR.
- Release ALT key
- Hit M (Move).
- Hit one of ← ↑ → ↓ arrow keys
- Move your mouse around (without pressing any mouse key) until you see the missing window.
- Press left mouse button on the desired place
( Note I assume you have English windows otherwise you may need to replace “M” with a localized start letter, e.g. “L” in French)