You can certainly delete select pages of imported PDFs (without UpDox):
1. right click on the imported item from the list
2. choose "Open(in default application)"
3. in Adobe and most other PDF software, there should be a tab on the left that says something like "Pages"... select that, it shows then in the left panel the miniature pages of the file... select/highlight the pages you don't like and press the "Delete" button on your keyboard (or use the right-click menu on the pages to select 'delete').
4. It should ask you if you are sure you want to delete the pages, say 'yes'
5. Save file, or when closing the file, it should ask you if you want to save it, again say 'yes'.
