Unsubscribing works from the link at the bottom of any email we send you: it carries your own code, so nobody else can take you off the list. No email to hand? Ask us and we will do it.
We keep your address marked unsubscribed, so it is not added again. To have it deleted entirely, write to lenscowboy@lenscowboy.com. Licence and receipt emails are not affected: they stop when the licence ends.