Im tryna make a custo version wy is it booting demo not the real mc and how do i fix

[UBGHyper]

same as question name

[GeekCornerGH]

Sadly, we can't provide support for this kind of modifications. You may be missing a startup argument or something like that.

[UBGHyper]

its about when i compile it and run it it ontly boots demo, same with th exe it says to use nebula to use real version

[Codixer]

Could you show something like a screenshot? What exactly do you see?
If you are trying to boot up cracked MC, that's not supported.

If you get the westeroscraft, you have to create your own distribution.json with Nebula