once finished can't close the flash.
It's the first time a user reports such a bug
Are you on Mac or Windows ?
If on Mac, is it the Mac App Store version ?
If Windows, is it the portable version ?
when you add owned dvds to your collection, why can't a reference be made to the dvd in the collection? So that the dvd can be found physically?
The "location" field is what you should use. You type any info you want that will help you to locate your physical media, for example "big box in the attic", or "shelve 2, row 4".