When I enter the villages, some buildings start to burn for some reason.. Dnno why, I don't have any mods installed that can cause something like that +on the older version it was fine.

Villages near spawn are raided villages. They burn and are raided by bandits or zombies. Can be adjusted in the config

Do I need to set it to 0, to disable it?

eneration {
I:destroyedVillagesNearSpawnDistance=1
B:useBiomeSpecificProvinces=true
spawning {
I:banditSpawnRate=8
I:caravanSpawnRate=12
I:disableMobSpawningNearVillage=64
I:enchantFirstBanditAndOrcChance=20
I:enchantSecondBanditAndOrcChance=60
I:fugitiveSpawnRate=8
B:lostToroQuest=true
I:provinceSiegeRate=0
I:toroSpawnChance=16
}