COv4 License Problem

I currently have Clinic Office v4 and suddenly today in the afternoon we got a message saying that License user limit reached. “You have reached the maximum number of concurrent users on this computer for your professional license (1).”

It was working fine in the morning however when I tried to login in the afternoon it didn’t work. I should have 5 licenses available for me to use but at the moment we are only using 2 devices for clinic office.

Regards,
Cynthia