Hi Daniel,
I'm embarresed to say, but there is a problem if you install Ja.NET SE into a directory path with spaces in it. I'll be fixing that in the next drop. It should be out up on sourceforge in a day or so.
But, the stack dump doesn't give me a good feeling that that is indeed what is wrong. Can you uninstall and reinstall into a good path, then try it again. After you do that, then check to make sure that Mono.Cecil was installed into the GAC by the installer. (ie. c:\windows\assembly).
Dave