The dimensions are weird. The spritesheet for a goblin from "Wood's Fine RPG Paper Maker assets" is just 64x144, and it contains a total of 36 animations.
Exactly. I also checked that asset pack and couldn't reach a conclusion.
if, while using the engine you come to an answer, share it here and I'll make an export layout for it.
I'll try but I fear it might be a lost cause. "Create your own sprites" is the Achilles' Heel of that engine.