I just checked again, and I can report that I can see the greyed out 'Junction View' with or without the JCV folder.
I have also tried to move the JCV folder to the Garmin folder, but the same crash happened.
I'll try to test with other maps with junction view, which I don't have any other at the moment.
By the way, I have no knowledge of getting any JCV with 'lower resolution'. Do you have any hint on that?
I also attach my Inventory list here, hope this helps.