Why are you still using DVD Decrypter? It's been abandoned since 2005.
Over the last couple weeks there's been a few threads of people insisting on using DVD Decrypter. I was wondering why are people still using it? Datahoarding tends to attract relatively technical people, so there must be some reason to keep using software that hasn't been updated since Windows XP was modern.
MakeMKV seems like the better option in every use case except full backups. However a full DVD image can be made with any imaging software or even just dd. Any player that can handle the DVD menus from an ISO is going to be able to decrypt during playback.
If you just want playable copy, then sure makemkv is the way. If you want to make proper encode, then riping vobs is the correct way. Ever tried to OCR subtitles from mkv made by makemkv?:)
I have a copy of it archived and actually had to use it for one dvd in an anime set of mine that makemkv kept erroring out on a few years ago when backing up and setting up my plex server
I use it to rip everything into one big vob then feed the vob through handbrake and use hardware accelerated encoding using my 3080ti to encode the movie in ~3 mins
works great for Movies but TV shows are much more complicated.