@IanMatthysen: I will add the custom .vmoptions to created backup files in future. For now on, I would recommend to install 64bit JDownloader Java bundle, see
https://jdownloader.org/jdownloader2
(you already do) and also have to customize the vmoption file, see
https://support.jdownloader.org/Know...vmoptions-file
with 16GB of system memory, I would recommend to use
to allow JD up to 4gb of memory.
Do not try to workaround the issue with split/other ways
in the end your JDownloader needs enough memory in order to load/hold/work with such large list.
We've got some new optimizations in pipeline to further reduce memory size of list/list entries.
Just set a good/high enough max heap value via the .vmoptions file and JDownloader should be fine to load the list.