Trying to help a friend get his install up and running and the Launcher is crashing when attempting to download the mod.
We've verified Arma2 and OA and ran both games, confirmed the game path in the launcher, and at first it would say "origins mod not found" and we'd be able to click download and it would immediately crash. Now it says the path is the same as the OA path and when attempting to verify it crashes. I've tried it with multiple copies of the launcher folder, and with the folder in multiple different places etc. Updated .net framework, and java, tried compatibility mode, run as admin etc etc. PC is a fresh install of Windows 10.

i had same problem with windows 10.. its crap!!
i fixed mine by reverting back to windows 7

You could always try Dayz Launcher

i had also windows 10, and it works.
can you post your logfile? it shoult be in launcher folder.