Editing .ini files

Hi there

New here, but have been following the foruns for quite some time.]

Last fifa i played and modded was Fifa 16.
I would always mess with the ini files located in the DLC folder, especially scout.ini and youth.ini

Can i do that in fifa 19? how??

Found the ini.s on the Frosty Editor -> Legagy Viewer

I export, edit the .ini and import back. Export to MOD, save, go to ModManager and activate the mod, but FIFA wont load (the loading screen appears, but crashes after that)

Any help??