In trial mode there are only 4 title you can remove Cinavia from listed here on the download page.
Bottem of the page
As you have purchased DVD Ranger CinEx HD and you haven’t received your Member Database log in yet go here
Please Remember only current titles in the Database archive can Cinavia be removed from at this time . More are coming soon.
Tutorials can be found in the DVD Ranger Support Forum
I have just downloaded the trial version to test to see if it removed the cimavia error code 3 message before I purchase it and after converting the movie I played it on my dvd player and it went past the original place that it first stopped at but a few minutes later the message popped up again, is there something I am missing I presumed this program would remove these messages.