Transition Problem

[FredBoekee]

Occasionally, when I go to change a transition (from one slide to the next) the transition box refuses to close, even when I press Ok or Cancel, and the only way to close it is to go to Task Manager and END TASK. I tend to lose the recent changes.

I thought it must be my PC, so I restarted it, and the identical thing happened. I am running Windows 10, and using PTE AV Studio 11.0.15 64 bit (Build 3).

Thanks for any help you can provide.