"Show in Explorer" does nothing when the Editor install folder is moved

How to reproduce:

1. Install an Editor through Unity Hub
2. Move the Editor install folder to another location
3. Without restarting Hub, in Installs, click "Show in Explorer" on that Editor

Actual result: Nothing happens, no error is shown
Expected result: Hub notifies the user that the Editor can't be found

Reproducible with: 3.22.0

Reproducible on: Windows 11
Not reproducible on: No other environments tested

Workaround: Restart Unity Hub

Notes:

• Nothing is logged when clicking "Show in Explorer".
• Changing a project's Editor version to the moved Editor also fails silently, because the Change version dialog reopens in a loop with no warning.