I was able to browse to a Debut Video avi file and open it in the preview window. For some reason, I get a message that informs that the file has no clips...therefore I can't designate start and end points or drag a clip down for concatenation.
The tutorial tells me how to do that, but it doesn't tell me what to do if I can't grab a clip.
I don't know if the editor can be used to edit avi files.
Question about the issues above and where to look in a users' manual for answers to glitches like this one?