I did a lot of testing today with all kinds of scenes, simple, complex, with and without plugins, long single frame renderings, lots of short ones, animations, trying to reproduce the error, but it seems to work stable now. I have absolutely no clue why it does work. The only thing i changed between the last crash and now, was deleting all the log files (corona, DR, Backburner, 3dsmax) so i have fresh and clean ones to send you, nothing else.
For me im ok with it because it now seems to be working and due to the fact that i did not encounter a crash since i cleared all the logs, it would not make sense to send it, right?
If the case happens and it will crash again, i will pack the logs and upload them right away. If there will be no more crash, i just wait until my 45 Days are over and then (99% sure) i will subscribe to the fairSaaS.
I greatly thank you for the fast support and apologize if i wasted your time with a (so far) self fixed bug and my moderate english skills.
Regards Gandolf