Thanks for your answer.
Well i finnaly fixed the problem, by forcing the game to "XP Service Pack 3" compatibility. I'm suspecting that it used to decide suddently to use DirectX11 and that now it use DirectX 9 with my solution...
Anyway i'll try the patch, hoping it is compatible with Metaboli Release...
EDIT : Well as i feared, patch installer says that game is not installed
I think that datas are not filled well into windows registry ; May Someone please, have a look with regedit, and search "Men Of War" into:
"Local Machine/Software" and "Current User/Software". You will probably find a Key like this :
"Local Machine/Software/1C Publishing/Install Dir" => "C:\Program Files\blablabla"
Please give me the path of this key, so i'll be able to install the patch. Thanks !