[2019] Can't find settings for growth of tree

There is no more "MaturityAgeDays" option for tree in Eco Server/Mods/Organisms/Tree
And all files in Plants saying this :

// The content of this file has moved to Mods\Autogen\Plant

// This file exists to make sure the old content is removed by Steam and will

// be removed at a later date.

Where can I change this now ? :(