changing proving grounds map

pardon my ignorance but how do you go about changing the proving grounds map? In the old game you renamed the map to level_proving but it seems like this is no longer the case.

Back it up and delete it out of your and have your renamed game file labeled as “game_proving” in your unzipped media folder. Can’t see why you’d need to with spintires mod though. Dev tools are in there under the game options and you can shut them off.

Thankyou @GumbootGambler - That works perfectly!