Extraction is supported on
Linux(Arm,32bit_x86,64bit_x86,PPC)
FreeBSD(32bit_x86,64bit_x86)
Windows(32 und 64bit)
Mac
It should run smooth and also your RaspberryPI is fully supported. I guess you made the misstake to copy over an existing installation
You need to install fresh on the device so the native libraries are correct for your system/cpu/bitness. Simply delete Core.jar and JDownloader will fetch all files again