Solution
If you have another computer with the same TestStand user accounts, you can copy the users.ini file from that computer and replace the users.ini file in your current computer. You can find this file in the Cfg file in the TestStand directory. For instance, the file path might be
C:\ProgramData\National Instruments\<TestStand>\Cfg.
If you have another user account with administrator privileges, you can add back in the default "administrator account." Do so by going to
TestStand Sequence Editor >>
View >>
User Manager. Once you're in User Manager, right click on
Users and select
Add User.
Once you've added the new user, change the name to "administrator."
Next, right click on the new user "administrator" and select
Properties. Under
Group Privileges, select
Administrator and hit
OK.