[Kerbal Space Program] When I try to login, it says “There is no account associated with this e-mail address”.

It's possible that you mistyped your email address when you created your account or filled out the Checkout Form of KSP Store. Send an email to KSP Support explaining your problem, your Private Division Store Account email address and your Invoice ID. Note that the Invoice ID is NOT the Transaction ID and NOT the Receipt ID.

 

If you're still having issues, please feel free to submit a support ticket.