What happens if an app is open when I uninstall it?
Short answer: Storage Studio quits the app first, then moves it and its leftovers to the Trash. Save your work in it before confirming.
Storage Studio quits it first, then moves it and its leftovers to the Trash. Save any open work in the app before you confirm.
The confirmation screen stays open with a live status while it works, and any problem is shown right there.