How to change your default PDF viewer - Adobe Inc.
www.adobe.com › acrobat › hubRight-click on the thumbnail of any PDF file. On the menu, click Properties. A new dialog box will appear. In the first subsection, the text “Opens with:” indicates which PDF viewer is set as your default. Click the Change button. Select Adobe Acrobat DC or Reader from the list as your default. Click OK to save and apply changes.