How to log into Logos when you believe it is not open but can't login in due to Single user install
If you are trying to log into Logos and are sure no one else has it open, yet get the message that only one user can log in at a time you will need to reboot your PC. You will want to do a complete shutdown of the PC, don't just do a restart or log off.
Once the PC has fully shut down wait a couple of seconds and then reboot normally.
You should then be able to log in normally.