question

[Thorn Is]

I did a few changes to the export_desc_units files but every time I open the game the file goes back to the way it was... whats going on?

[MarcusAureliusAntoninus]

The trivial script will replace the EDU with a sp or mp version every time you start EB. You have to make the changes to that EDU and not the one in the Data folder.