Resetting default app settings in Windows 11 sends your file type and link associations back to the defaults, so files and links open in the apps Windows normally uses for them. It is the quickest fix when the wrong app keeps opening your files after you or an installer changed something. The reset is a single action on one page of Settings.
- In Settings, go to Apps → Default apps and select Reset default apps.
- Afterwards, pick your own apps again with Set a default app.
- To fix only one file type, change it directly instead of resetting everything.