Sounds like something happened to make a QuickBooks file associated with Adobe and if that's the case, that's an easy fix.

1.  Open File Explorer
2.  Find a QuickBooks file
3.  Right click on the QuickBooks file
4.  Click on "Open with" then "Choose another app"
5.  At the top of the new pop-up window that opens will be the default program listed to open the file.  If it says the Default app is Adobe, proceed to Step 6.
6.  In the pop-up window from step 5, find QuickBooks in the list of apps
7.  Select QuickBooks and at the bottom of the pop-up window, select "Always"
8.  Done