Help with finding movies

I feel that I should be smart enough to figure this out, but evidently not. I am using dvdfab Platinum and I cannot locate the movies to put them in to convert them. I noticed when you open the window to find movies it has my documents highlighted. I moved the movies there but when I open the window they are not there. I am really new at doing any of this and I need help.

Just pop in your dvd disc in the dvd player of your computer and point DVD Fab platinum to the appropriate drive letter.