Big Problem with RatDVD. Failer

i have a new File ratDVD. (Win-rar-archive)
Now i want startup RatDVD. When i want open the file it coms a failer (look at the Screenshot please)
What can i do now?

did you unrar the file already?

No, i dont have.
I think i dont need this to do.
When i unrar this file, than i have to File (2 Movies)

“Invalid archive footer” means that the file is corrupted. I had this once with a broken file. After I replaced it the error was gone.

how are the two files named?