PT8 - S/R Problems with pre-existing Project Folders and User Folders

Question

[Win10x64, PT8 v63]

Scenario
I am imaging laptops for a upcoming PT8 workshop.

Sequence
I used a disk image to image a second system.
I created a new user on the second system.
I registered PT8 for the new user.
(The users on both systems need the same four projects.)
I added the second user to the four projects on the admin system
Only 3 of the 4 projects showed up in the S/R window.
(I tried all sorts of cleanup tactics without success.)
I finally looked in the My Paratext 8 Projects folder.
I deleted the old folders for the project that would not show up in the S/R windows, and I deleted the previous User folder.
After that it was fixed.

It appears that PT8 has problems with folders from a previous user with access to the same projects.