[Developer Feedback required] JDownloader installation is getting too big

[Bilkoff]

I have installed JDownloader in a headless machine some time ago, but the installation folder is getting very big (>1gb and >150k files) and I don't have enough space there

Which files/folders are safe to delete? Logs folder? Inside cfg folder there are a lot of files too

If I export the settings in a .jd2backup file and restore it in a new installation, will it have all that "unnecessary" files?
How can I export/import the settings in a headless installation?