I Have an AMD RX580, and an Intel core i5 6600k. I have tried removing launcher files and verifying, and have tried verifying without doing that. And I can launch Arma if I bypass the launcher by using Arma 3 sync. But I can't enable my workshop mods without a working launcher. And yes it has previously worked on my system this just sort of started out of the blue. Thank you for the quick response!