Yes, its greyed out.
It wont allow me to edit it at all.

Its the standart first profile it makes when you launch the game.

Yesterday.
And then again today.
I cant give more specific.

Uploading the launcher logs now.
Cant find the steam logs still.

It just random dissapear. Totaly.
And it doesnt work just trying to launch the game.
Its like i didnt install the mods at all.

And yes, it happens randomly, so i cant give any specific reason why it does it.

I cant find the steam logs at the location you said.
But i got the Arma 3 launcher logs.

Though before i send it. What do those logs show?