Hi, I have purchased your kerbal space edu version and I need help, please. I am trying to get them installed today while the students aren't here, but have not yet received a response from the kerbal space help email. I have created an account and I see my 25 downloads there that I purchased. I downloaded one to my computer using the link. It asked for a license key. What number is this? It is not the code sent in my license key email. I have tried it several times. Please help.... Thanks.