Cannot open backup file

[FredT]

Having created a full backup of a blu-ray disk, I then attempted to open it with MakeMKV. I navigated to the backup folder, but the "Open" button remains grayed out. Using OS X Snow Leopard, MakeMKV 1.7.3. Am I doing something wrong, or is the backup not any good?

[Romansh]

Open the index.bdmv file.

[FredT]

Thanks!