Yes on the WSUS question, and thanks we're glad you enjoy the program!
The DataGrab backup location is actually supposed to save whatever you have in there automatically when you close d7x. It does do this for the "Additional Folders to Backup" section and others, but there is a bug keeping the combobox from loading the saved value. I should have this fixed for you in the next release. Basically what will happen is you just set the location you want, then close d7x (do NOT End Session) and open it again, you should see the same value in the box (plus the client name.) At this point (when it is saved and working as expected) then be sure to save your config to Config Mgmt Portal in the Servers menu on the top leftish area of d7x; this will ensure the setting persists when you download your config or via the Remote Deployment Tool.
Like I said, small bug; should be fixed just now, still need to test it, and then the next release will have the fix.