Larian Studios Forums Divinity - Original Sin Divinity - Original Sin - Technical Issues Friend on same version cannot join for version dif

It's "v1.0.67.0" on my side, i will ask my comrade what version is shown inside the game, but we tried to use the same .exe (sent mine) with no results, or maybe the version doesn't depend on the game's binary ?

How would my comrade downgrade version if there's this kind of problem as he is using Steam with no real version control on end user side ?

Regards