Change the "default app" in Windows 10

To change the default program in Windows 10 that opens a particular file type, follow the instructions below. In this example Windows 10 defaults to opening PDF files in Microsoft edge browser which significantly reduces your functionality when working with PDF's here is how to change it to Adobe PDF reader . 

• Locate a file of the type you want to change, right click on the file and select "open with" then "chose another app" (see points 1-3 below). 

• When the dialog box comes up to make the selection, chose the app that you want to use (see 4 below), tick the "always use this app…" checkbox (see 5 below) and then press OK
• From that point on this file type will open by default with your preferred program.