thanks for your help but if you notice the note above yours it clearly states that i found and uploaded the dump files

mp - king of the hill
no mods
i do have dlc, karts heli sniper etc

I followed instructions but have no app data file in <name>, i have one in default.migrated but no sign of Arma3

when launching Arma i also get a message at the bottom saying not updated, steam not running

I've uploaded my crash dump files to the file upload section, sorry for the double post but i had problems trying to edit my previous post.

Thanks in advance.