There's an extensive FAQ here.
http://www.flip4mac.com/fusetalk/forum/categories.aspx?catid=66&entercat=y
Always use Feedback Form built in to the program to contact developers but if you don't think you're getting a fast response to a given issue, you can post the issue here.
http://www.flip4mac.com/fusetalk/forum/categories.aspx?catid=67&entercat=y
Flip4Mac Drive-in
Store and play your DVD movie library on your Mac
Version: 1.0.3.1