Launcher not launching

[Steele-. 0]

Whenever i try to launch arma 3 with steam it states that it is running, then moves to syncing and then back to being closed, in this time the launcher does not come up on screen at all. However i can still launch the game by directly opening the main file. Iv'e tried deleting any launcher file/folder and validating the game, to no effect. also with reinstalling the game, also doesn't work. I also have the problem of mods appearing in my expansions menu in-game after they've been uninstalled/ un-subscribed.