Have you tried reinstalling it? There's prolly something wrong with the program.
Something you could try, though, is fading manually with keyframes. Mask around the image in event pan/crop and set a keyframe at the start point of the fade, and a keyframe with lowered opacity at the end point. You can change the keyframe type or add some more keyframes in between if necessary. This is a bit tedious but in the end you have more control over your fades