Export PuTTY settings

Everytime I reinstall the Windows, all my PuTTY session records are gone. That would be a nightmare, if I have to add back my servers records one by one.

Open the registry:
Start Menu -> Run -> regedit

Go to "HKEY_CURRENT_USER\Software\SimonTatham"
Right-click SimonTatham and choose Export

Copy the file to a new machine and then right-click and "Merge"