I have been using 'MakeMKV' for free for so many years. So I purchased a license on Aug 1st because one: I didn't want to wait for the 'free' key to be updated, and two: I have gotten so much use out of the product for free that I felt I owed it to you brother. I feel a bit ashamed that I hadn't purchased it a long time ago.
I am sorry to say, I too am one of the folks that ordered at the wrong time. I assume that all of us purchased the license and there was a SNAFU in the automated delivery system.
I have sent an email to 'support@makemkv.com' like the email states from PayPro Global suggests. I haven't heard anything yet.
More than anything, I just hope your doing alright Mike and everything is OK. I often worry in a one-man operation that something bad may have happened.
You've clearly created a tool that everyone appreciates, just look at all the people upset when it's not immediately available.

I know so many people are up-in-arms over not receiving their license key immediately but I grew up in the days before the internet and sometimes it took many weeks to receive a software key or disks. I have waited before and I can wait again.

For all the people that are losing their $#!t over this delay I just want to say, Mike didn't have to make 'MakeMKV' available and fully functional for free. He could have put some limits on how many free rips I could do per free license, but he didn't and if it takes a few weeks (I hope not) to get my paid license, just like in the old days, then so be it.
Just want to say I appreciate you brother.
Shalom My Friend