I have dealing with some pretty long asf or wmv files (2 to 3 hours.) The audio is in sync with these files, but when I import into Videopad (2.41) for editing, the audio goes out of sync... seems to be the further into the file the more out of sync the audio becomes.
The work around I have found is to convert to another format, like MP4 (prism works fine) and edit that file.
This is an obvious bug in VideoPad, which I hope will be fixed
Having tried 3.XX it is impossible in its present form, because it is imposibbly slow.