Did you crash while “Map Maker” was opened?
I suggest you to check if you have any double particles. Go to C:/FeralHeart/media/particles and search for any .particle file ending with _0, _1, _2, _3, etc. Make sure to delete these.
I opened map maker and is not crushing
I have in FeralHeart/media/particles aura,aura.particle,fire,fire.particle,flare,smoke,splash,star,water,water.particle,watersmoke
And i have the current version