Manage your subscription
Enter your license key and your registered email address (the one you bought with, or the new one if you changed it on Stripe's customer page). You will go to Stripe's customer page, where you can cancel, change your card and see invoices.
Lifetime licenses have nothing to cancel. If you cancel a subscription you keep access until the end of the period you paid for.
If you don't have your key or the email address, email contact@revot.jp.