Method 1.
Follow the below video or the proceeding instructions.
1. Right click on the file you want to choose the app for and choose properties. You will then see the properties dialogue. Click on Change.
2. Choose an app from the list of apps you would like to use to open the file type. Then click on Set Default.
Method 2.
Follow the attached video or the below instructions.
1. In start menu, search for the Default Apps settings by typing default apps.
2. If the default app isn’t listed in the apps list, click on choose default apps by file type.
3. For this example we want to change the default app for .pdf, so let's click on the .pdf file type to open the app selector.
4. We want to make sure .pdf file types use Adobe Acrobat. Choose it from the list and then click Set Default.
4. You're all set! Please note that this will work for all file types, find the file extension (.pdf, .docx. .xlsx, etc...) and select the desired app from the app selector.