I'm having trouble explaining.
The upper left of the window is rounded for "inactive" tabs. My first screenshot is of an inactive tab - the screen capture software took focus so the single open tab is inactive. Yours is not. Leave only one tab open and take focus away from the file explorer window - the first tab will be rounded in the upper left. Or look at my screen captures above. Open two tabs, make the second one active (click on it) - the first tab will be rounded in the upper left. It has nothing to do with interactions with any other program. This is how all windows behave by default now on Windows 11. It isn't specific to Groupy or any other program that uses windows controls.
So I "purged"/uninstalled and reinstalled and it behaves the same way. The only 3rd party apps running are Steam, MS Powertoys (only Powertoys Run running), a VPN, Auto hotkeys, Windows Defender and Intel driver assistant. Nothing else. SFC /scannow reports no problems. No disk errors, no unexplained behavior with other applications, full updated system... I've run Groupy for years on different systems. Perhaps this isn't a common issue, perhaps it is a configuration for my system. I'm asking for things to try or suggestions.
