I installed version 0.1 B13 over my existing installtion of beta 12 and now it crashes on startup with a GPF. So now I cannot run dude at all.
The same problem…
Copy data folder to secure place, install beta12 from http://www.mikrotik.com/download/dude-install-0.1beta12.exe and replace data folder
me too 
w2k sys
same here - but the dudes.exe - the server is running
only the config tool crashes …
Another whit problem here
we have fixed it, new version is on the way