hello I would like to know if there is a way to deactivate the grenades both from Loot and that the zombies can use them.

Not in this plugin, if you want to remove them from loot you can use any of the loot plugins however I'm not sure if there is a plugin that stops the zombies from throwing the grenades.

thank you very much and say that I really like the plugin, I am implementing it in a post-apocalyptic role server and it is very useful: D