Experience a momentary power outage. Computer automatically rebooted and can't launch Poser 11 Pro

Poser log in system shows this error

Poser single instance check forced exit.

Does that mean my system thinks another copy is already running? Rebooted multiple times. Shutdown and restarted several times and same problem. Same error. Activity monitor shows nothing running relative to Poser that I can see

Gary

"Those who lose themselves in a passion lose less than those who lose their passion"