In November 2014, I purchased and downloaded TMG v9.04 from a seller in (I believe) Sweden. I installed it with the key he sent, and it functioned perfectly until a month ago when, despite what I thought were my successful efforts to prevent it, Microsoft automatically installed Windows 10. After a day or two of using the newly-installed Windows, I discovered a number of things I did not like about it, including that TMG did not work well, albeit with full functionality. I followed Microsoft's directions to revert to my former version, Windows 7 Pro. TMG now opens as a trial version, but with very limited functionality. I no longer have the e-mail address, identity of the seller, and I did not write down the unlock code (or if I did, I can't find it). HELP!