Directory Opus locking/freezing

I am experiences lock ups with Directory Opus. I am not sure if it due to a recent upgrade of the software or a windows update. Is there a way to determine what is happening? Any recommendations? I have been a long time user and rarely experienced any issues.

The best course of action depends on when they happen (i.e. in response to which action).

Good places to start:

Thank you - this explains my problem to a T