Still not valid.
I got two computers, one HTPC and one in my home-office.
I rebuild my HTPC , different Hardware, installed Win 8 on SSD, so first I installed MC 17 again and restored it with my key, accepted no problems.
Than i would like to try MC 19, I bought a key July 30 , used the latest mail with key you send me downloaded MC 19 from your website and installed it when I enter my Registration code ( the Permanent code) it says not valid for this version of MC. I think the problem is the key is not valid for MC 19 only for MC 17. So I want to upgrade to MC 19, but that regristation code is not working on MC 19, that's what MC 19 says.