After some research we found out that only one MIB of the whole package causes the Dude crash:
dmtfdmi.mib
We don’t know enough about MIB structure but we think that the syntax or something else are incorrect.
After your Dude crashed you can restore it from a backup or you delete the defective MIB (in our case:dmtfdmi.mib) from c:\program files\Dude\data\files\mibs\ and restart the service.
Thanks to Mikrotik for this great Software!
Greetings from Germany
Sebastian