Revit :: Getting Work Out Of Demo Mode

So, I was told I needed to use Revit for my course, went on the website and found 'free student version, download now, it's great' or some such, and downloaded it. Soon after it came up saying I needed to activate the product, and gave no indication of how to do so, I left it for a while, then, there being little else I could do, until it came up saying my trial version had run out, and that I needed to activate right then. By then, of course, I had forgotten my password, tried everything it could have been, none of them worked, so I arranged to change it, turns out I have to change it twice, the first new password only working to change it again, so now I have had to make up some new password I will never remember, but anyway. whilst I was trying to convince it to let me sign in with my new password, I found that I could actually still get into the program, and so started work. Turns out I was working in the 'demo mode' and cannot save everything I have done, but now I have finally managed to activate the product and open the real version, but i still cannot save what I did before.
 
So, long story short, my work is in demo mode, I want to save it, is there any way of copying it into the real version that I can now access and saving it there?