Hello,
Since I regularly use JDwnloader headless on dietpi, it would be very nice if if was included at Dietpi Software.
Autostart at boot would be also nice, since it need to be configured.
Thanks! 
Simplest to install is to use docker and portainer
This is a good howto
https://www.youtube.com/watch?v=30MYRgCObu8&list=PL846hFPMqg3jwkxcScD1xw2bKXrJVvarc&index=4
They provide official install scripts, so I don’t see a reason to use docker.
32bit:http://installer.jdownloader.org/JD2Setup_x86.sh
64bit: http://installer.jdownloader.org/JD2Setup_x64.sh
This scripts are for 32bit and 64bit procesoers not for ARM
This shouldn’t be a problem because it’s written in Java, which is crossplatform compatible?
And e.g. RPi 3 and 4 using 64bit processor architecture, or am I wrong here?
And Raspberry Pi is listed here as supported:
https://support.jdownloader.org/Knowledgebase/Article/View/52/0/install-jdownloader-on-nas-and-embedded-devices
There is also a tutorial for installation on a headless system (which is different from using just the install scripts I posted earlier), sry for the wrong info.