Re: Completely Remove Mythtv
FWIW, the OP's instructions were to delete all the contents of the mentioned folders. I didn't do that -- I removed all the contents and the folders. Subsequently, my reinstall of mythtv (through the software manager of mythbuntu) was a complete failure -- I can't tell you exactly what happened but I was unable to get into the backend or frontend.
Only fix I saw was a complete reinstall of 12.04 (mythbuntu) which then created a fresh mythtv install -- and a clean database. This was a mixed blessing. While it was more work, my system is now up and running very smoothly so far.
Now I just have to find a way to create a "recover" dvd so I can always "get back" to this pristine state.
HTPC build: Mythbuntu 14.04, MythTV 0.27+
Mobo: MSI FM2-A75MA-E35, AMD A10, Video: Radeon HD8670D, Tuners: HVR-1600, HVR-2250, SSD and HD: 3TB system