the thing you need to understand is that DVD Profiler profiles DVDs (and Blu-rays, ...) but not movies.
So a movie will only find its way into DVDP if it is sold on a plastic disc.
If you have such a disc, you can use the UPC / EAN to add the disc to the DVDP database using the "Add by UPC" dialog.
If you just wish to keep track of your watched movies or digital purchases, then switch to the "Add by Title" dialog and then uncheck "Download from Invelos" at the bottom of the dialog.
Then you can use tools such as Cast/Crew Edit 2
to fill up cast and crew data.Note:
Cast/Crew Edit 2 is never to be used to contribute a UPC / EAN title to the online database! Data mining for commercial purposes is forbidden
by IMDb and contributing IMDb data to DVDP is forbidden