Sorry for the trouble you're having.
Sounds like your Acrobat preference file isn't being written over properly.
Try the following:
- Move the com.adobe.Acrobat.Pro.plist ( or .Standard.plist)file from Users\<username\Library\Preferences to your desktop
- Launch Acrobat X
- Configure your Quick Tools again
- Close Acrobat X
- Relaunch Acrobat X
If your preferences now stick, it was your old prefs file and you can trash it.
Let us know how it goes!