Ah, looks like I can't have two TM opened at the same time, oh well x)

I reinstalled Nations and re-associated gbx with Nations, and it's working again. I guess I'll just keep Nations for the replays, so I won't have to leave the server when I download an online replay from United.

Thanks for the link Hubby, but it didn't work. When I enter the game directory in the program, it goes green and everything is greyed out (which means, according to the forums, that it should work fine). TMarc : I'm gonna need more details to search the registry... but I think I'm in way over my hea...

I uninstalled TM Nations, I only have TM United left. Here is what came up when I searched for the exe: http://image.noelshack.com/fichiers/2016/18/1462532126-registry.png I do know that .gbx files can be opened as challenges. When it worked, I would open a .gbx file, and on TM it would ask me "...

Well, I don't really have anyone to help me.
If there is a tutorial, I'm sure I can follow, and if it appears too complicated I simply won't do it.

Hi,
I have uninstalled and reinstalled United, problem is still the same.

What do you mean searching with the registry?

Hello, I used to play on Trackmania Nations Forever, and all my replays (.gbx files) were associated with the game, and I could open them with no problem. When I bought Trackmania United Forever (I still kept Nations on my PC), I could open .gbx files with both games (Nations by default, but if Unit...