Quote: Do you recall any other details about what was happening when the problem happened? When you say it "hangs", what you mean specifically? It stops responding?
Yes. And TheBrain window was distorted
Quote: Do you get the Windows dialog that says "TheBrain 9 is not responding"?
No, but i was forced to turn your app off using task manager
Quote: Are you running any anti-virus or other background applications that could be a factor?
I use Kaspersky Internet Security 2018, but your app is marked as trusted.