Right-click the file → Open with → Choose another app, then choose the program you want.
Step by Step
- Right-click a file of the type you want to change.
- Select Open with.
- Select Choose another app.
- Choose the application you want to use.
- Choose the option to always use that app for this file type when Windows offers it.
If That Doesn't Work
- You can also open Settings → Apps → Default apps and search by application or file type.
- If the program is missing, make sure it is installed.