If you keep getting the Select an app to open this file popup in Windows 11, the error is usually associated with missing file associations, corrupted system files ...
Windows 11 might not be as great out of the box, but it gets close when you add a few programs.
Example: AI analyzes your AirfoilTools add-in, finds the best airfoil from 1,538 profiles, stores results in SQLite, and shows a popup—all in one command!