The error code you provided is pointing the way. Use Windows Explorer, and look at the DVDFab directory , and you'll note that there is a sub-directory to DVDFAB 5 called CGP.
There are two files in that directory. The error code indicates that Fab can't read one or both of the files. Somehow, one or both of them have become corrupt.
Please do an un-install as outlined by StormJumper (links to the procedure, depending on your O/S, are located just under his signature on any of his posts. I know he's posted re your problem, so it'll be easy to find).
Then please re-download from the DVDFab.com site, re-install (both the program and you registration key) and try another copy.