I had been thinking since discovering it a couple months ago about buying sfc:ce, well I did so today - I too initially couldnt unlock the iso, and sent an email message to the management. i was amazed by how quick the response was (like within 10 min of sending it). i went to
http://www.magiciso.com as instructed and had zero issues, installed the game and it runs perfect. I am very happy! I was actually a little worried before I bought the game that single player campaign wound not work and there would be problems, but everything runs super smooth on my 64bit set up. all i can say is devs you are amazing Im happy to be replaying a childhood favorite of mine I thought lost forever
if anyone hesitating out there like I was all I say is no worries go for it, you wont regret it