Can P6 Local be reloaded without overwriting the existing XE database?

We're using 8.2.

We now have another standalone user that can't open P6 because the following screens pop up when trying to login. We've tried using the Username and Password initially used to setup the XE database, but they don't work. We've tried numerous suggestions, usernames / passwords, and other information, but nothing works. It appears this is a defect in the program.

We are at the point where will probably have to reload the program for the users with this problem.

Can the program be reloaded without overwriting the existing database?