It is probably best to keep the whole plugin on the same version, you can roll back the same way you update: https://www.fmod.com/resources/documentation-unity?version=2.0&page=user-guide.html#updatingupgrading-the-integration
It is probably best to keep the whole plugin on the same version, you can roll back the same way you update: https://www.fmod.com/resources/documentation-unity?version=2.0&page=user-guide.html#updatingupgrading-the-integration