Unable to add new monitor

[rfeyer]

OK, so with tons of help from Magic919, I was able to install/ run ZM on Ubuntu 20.04
Then I got a bit over-zealous, and decided to change the user name from admin to something else.
As I could not find a way to do that (changing password was easy), I added another User with Admin privileges (so I thought?), then deleted the admin user.
Hmm, so, now I can still use the system quite well, but, I can not Add a Monitor (greyed out)
Also, when in my new user profile, there is a Monitor restriction of the monitor I had previously installed/ configured.

Please tell me I don't have to re-install !!!!!

[rfeyer]

I found the answer, which of course, sounds quite obvious:
I made a new user, as a full rights user. Then deleted the previous user.

What was not obvious: While creating new user, the restricted monitor was auto populated with the installed camera. I found out that Ctrl - click on Monitor actually deselects it.

All works again