How to backup/restore your JD configuration
This can be helpful if you:
[Beginners] How to create a backup?
[Beginners] How to restore a backup?
[Advanced & Headless users] How to backup- and restore your JDownloader configuration via configuration folder backup (settings, accounts, downloadlist etc.)?
Alternative: How to backup your config even if JDownloader doesn't start at all e.g. due to a broken installation.
Manually
Inside your JDownloader install dir you can find a folder called cfg.
This folder contains your complete config so you can manually create a backup of it.
Automatically
You can of course use external backup applications to automatically create backups from said folder.
Examples of such applications:
Windows, Linux, Mac: FreeFileSync (link), Syncthing (link)
Linux: Resilio (link)
Restoring a cfg folder backup
Copy the previously stored cfg folder over to your new JDownloader installation.
I've restored my previous config but installed JDownloader extensions are missing, what to do?
Extensions are not part of the config. Simply re-install them.