Having similar issues that started this week (after BIOS update). Crosshair Hero VIII, Ryujin 240, ARGB strip, fans, etc. I did a quick check for updates every 2-3 days since scenario profiles were added to mine because the settings won't change back to a default after quitting a game. (also looking for more control for fan speeds, etc. in the profile setup, more like asus laptops) Anyway, haven't been on since the update, but when I started up, I got pushed to a scenario for a game at windows start, I check armoury crate and the "aura sync" and device pages were empty, no devices showing. When I tried to switch tabs from synced devices to lighting effects, it repeatedly crashed the app. Tried this several times, restarted, tried again. Still crashed.....
So after numerous failed attempts to change my lighting manually, I uninstalled Armoury Crate. IF YOU ARE CONSIDERING DOING THIS, WAIT! After uninstalling I have not been able to re-install. Not sure what happened, I've used the windows uninstaller, the Asus uninstaller from the same download page as the installer. It runs until moments from completion and fails. I clicked download on the MBs page and it goes to a windows store beta file that has been removed/locked. (FYI, I have DLed the installer about ten times to make sure I have no issues affecting the download and got the same issue with each new copy, clean installed each time)
In the end I located the package installer for just armoury crate that the main installer dropped in a temp folder. It consistently hits around 95% then fails with a "0x80073D05" error (it's a microsoft appx installer file and the code means they don't have a a clue what happened). So, not sure if there is an issue with the current installer and re-installing, or if something happened to my system during the uninstall.....