So you tried out a Daily Build and you didn't like it?
Here's how you'll "go back again".
- Disable PPA.
- Go back to old version
- Copy back Backup
Go to "System → Administration → Software Sources". Go to "Other Software". Identify the archive you want to disable. Click on "Remove". Close the dialogue.
Go back to old version
Go to "System → Administration → Synaptic Package Manager". In the "Quick Search" window search for the package you're looking for. Select the package from the list. Click on "Package → Force Version…" or Hit Ctrl-E. Go back to the old version.
Copy back backup
Hopefully you backed up your user data. Copy it right back to where it was.