http://www.jordandelozier.com/2009/03/backupexport-and-transfer-putty-settingsconfiguration/

Exporting Settings

  1. Execute regedit
  2. Expand each node to this branch: HKEY_CURRENT_USER\Software\SimonTatham
  3. Right click SimonTatham and select Export
  4. The Save Dialog will appear labeled “Export Registry File“.  Select a location to save your file. I named mine “putty“. Leave “Save as Type:” to the default “Registration Files (*.reg)”.
  5. You should now have a file named “putty.reg” (or whatever name you chose in the previous step) in the directory you selected.