This is a bit unclear for me.
Is your paid tool required for building the game, or is it only used for converting .fbx to a different data type?
In another post he said "Paid tools are allowed because they produce assets you have the rights to",
so we're only allowed to use paid tools if they are only used to produce assets.
If I understood correctly if it is used to load .fbx into Unity it would be against the rules?