From the German forum (translated):-
A new patch - version 188.8.131.52 - is online!
improved program stability
Fix: Additional effects did not work on some systems
Fix: wrong thumbnails for video scenes in storyboard mode or in the scene overview
Fix: display error in the arranger
Fix: Fixed malfunction while using rotation and resizing in the tracker
Improvement: Grip in the video monitor now bigger and sharper
Improvement: Windows 7 compatibility
improved caching behavior for images
Installation via the menu item -> Help -> Update online.