Am pretty sure i bought this long ago how do I find my key or what not

[speedygonzo5]

Just wondering where do I find my key or license I bought long ago

[Woodstock]

When you register, the key is mailed to you by the payment processor. Depending on WHEN you registered, the email could have come from "avangate.com", "paypro.com", or one of their side companies, but it would be addressed to the email you used for registering, and will have "makemkv.com" within its text.

The payment people should have it on file, as well as Mike ( support@makemkv.com ).