Just FWIW... I used a self-made Windows script, now an AHK script, to backup selected registry keys daily (via scheduler) in monthly archives using (Win)RAR. So, whenever I have to restore my system drive from an image, I don't lose settings from my used apps.
To use...
1. Install Autohotkey
2. Edit the script and change the path to rar.exe (or Winrar.exe)
3. Edit list.txt. Syntax --> {name of file}:{registry key} (Samples included)