To use the Windows 11 multi-app camera feature, join the Windows Insider Program and install Insider Preview Build 26120.2702. Then go to Settings > Bluetooth & devices > Cameras, select your camera, ...
If you cannot change the default app by File Type in Windows 11/10 then this post is sure to help you resolve the issue. Windows 11/10 provides built-in options to change the default app(s) to open ...