Hands up. I admit to being irretrievably dumb.
I bought the 8Dio - Modern Scoring Bundle.
Registered the serial number in Native Access app on Windows.
Clicked the Add to Library button.
And got error message shown in the attached pic.
I checked. The library has all of my NI instruments.
I looked up the error.
It would appear that the path must include the downloaded files.
I don't see any option to download from with the NI Access app as shown in 2nd pic (which uploaded above the first one for some reason).
I would appreciate anybody with more brain power than I to steer me in the right direction, please.