Hello,
I would like to also ask for a help. I have following problem:

Raspberry pi B+. Fresh Raspbian installation after "apt-get upgrade", up-to-date Jdownloader installer.

Jdownlader window is opening and suddenly crashes, log below (the same error as in posts before).
I have tried both gui and headless option.

Is there any way to fix it? Thank you in advance.

[Jiaz]

Please provide the output of
cat /proc/cpuinfo
EDIT: forget it it's included in your error log

I guess the RaspberryPi detection fails for you and the wrong native library is loaded and that crashes.

[Jiaz]

Update will be available in 5 mins.
Delete Core.jar and the folders tmp and update and start JDownloader again
It then should no longer crash. Feedback would be nice

thank you! it works perfect now. Thank you for such prompt support

[Jiaz]

Thanks for the feedback!