Is there a way to access files in /data/systems?

Is there a way that I can directly view/download the files for installed systems – for example, if I wanted to compare the system .mjs file currently installed on the Forge to a local version?

Once you’ve uploaded a custom system you won’t be able to download it again, it stays the way you uploaded it.

You can upload a new version of the system again to update it / replace it.

If you haven’t edited the system at all, you should be able to go to the github of the package and have a look at the release. That would be the way to download it too.

Note that you can also access any files directly via its url, like for example.