xnview is crashing frequently

[woauchimmer]

Hey,
i organize my visuelle material on my pc with Xnview, many pirctures, many movies. I like the program for the fullscreen mode and the plenty of foramts, but it crash every time. I change the folder and it goes down. many many times or i click to see the movie in fullscreen, the program goes down. When i start new the next time, the same.
I happy when its not crash at session.
My system is W7 64bit 8G ram and i install the new version, not beta.
What can i do, that it works?
Thnaks

[xnview]

The folders, where you have a crash, have movie files?

[woauchimmer]

yes.
most of the folders have moviefiles

[xnview]

which format? avi, mov?