@memoriesin8bit The feature tags you can use like this:
if OS.has_feature("demo"):

@risingtail That may be what I need. I wasn't aware I could have conditionals in that field. Tho I hope I won't hit any limits there cause it may be a list of a hundred files or more.

@memoriesin8bit Ah, and you can't have conditionals in the export field. You have to use it in code. I use it to specify if the demo or full release datastore file should be read/parsed. So, if demo, use demo file (and have full release file excluded). If release, use full release file. Simple enough for my needs because I have everything game data related in a single file.

@risingtail I am not sure if I understand then. Because this now reads as if I CAN have a file in which I specify which files to in/exclude. That would help me greatly. But from your previous posts I understood that this isn't possible. I'm a bit slow today due to lack of sleep. I'm sorry - entirely my bad. I may need to look up some tutorials about that.