JDownloader should NEVER crash! JDownloader itself cannot crash. There is always a reason outside JDownloader that causes crashes like Hardware/Drivers/Firewall/AV or Out-of-Memory.
So the question to answer is, why does JDownloader crash in your setup/situation.
Whenever Java crashes, it creates a .hserr file in the application/JDownloader folder. Please send me those files to
support@jdownloader.org
Also firewall/av might kill JDownloader when they *think* that it's doing bad things.