Issue with editing the config

Hello, so I´m pretty new to editing the config of Plugins. 

First Question: Can I edit the ingretients of a meal or add my own meals? Because I tried to add 2 own meals and then the plugin won´t work anymore

Second Question: Can I edit the gather Source from Ingrediens? We don´t have any Dessert Trees on our Map so we won´t get any Pineapples and we would like to add it to the Pumpkins.