SU 2024 does not properly handle some display configuration.
Most likely the Add location windows opens off screen.
Make sure you are signed into SU.
Follow this guide exactly after opening: File>>Add Location
0. Wait about 5-10 seconds without move or click with a mouse
- 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 initiate letter, e.g. “L” in French)