Celltrim for DVD Backup?

[cas206]

I have a disk that fails to open for CellWalk. I can open the disk with CellTrim and make MKV files. But I have been saving all my DVD's using "backup". ISO's can be navigated to and run under Kodi. Using "backup" mode seems to only try CellWalk. Changing in preferences doesn't make a difference for "backup" mode. Using version 1.17.7