http://bugs.winehq.org/show_bug.cgi?id=19514
--- Comment #9 from Maciej Pilichowski bluedzins@wp.pl 2009-07-31 10:06:32 --- Actually it is (older though), and I suspect where the problem is. Here is the download: http://www.supermemo.eu/supermemo_ux#download
now, please note, that under download button there is a section about downloading .net package. So in free version you have to do it yourself.
In "full" version it is all bundled together (installation is one step) -- I tried to install free version, and .net package does not install, and supermemo installs but crashes as before.
So I suspect this -- full version installs, but .net does not installs (just as it is installed, tried to, in standalone version). That is why supermemo crashes (it *JUST* is my wild guess) -- lack of .net.