How do I start over?

So I’ve been through many several different versions with changes to how things are unlocked, etc. So how to I start all over from scratch? I want to go back to the fresh-out-of-the-download state.
Is that possible without uninstalling an reinstalling?

Thank you.

You can go into “your documents”/my games/GratuitousSpaceBattles

and delete/rename the sc.dat and unl.dat to reset your campaign stats to 0 and your unlocks to 0

Doesn’t affect your being registered or your username so its likes starting fresh anew

That’s perfect! Thank you.