I followed a guide from Ryhon0 to create a mod, and got to the part of exporting a zip file with the ModExporter plugin, saw that we now have to change the zip file extension to .vzm, and had it show up in the mod loader, but the effects don't actually show up in game.

I wanted to make the larger caliber rifles do more damage but also have greater recoil, and and for the first test I just tried changing the KAR-21_308.tres damage value.

In my mod.txt I added:

[remaps]

"res://KAR-21_308.tres"="res://mods/RifleMod/Items/Weapons/KAR-21/KAR-21_308.tres"