I went to Steam -> Library -> Tools and installed both the Civ6 Development Tools and the Civ6 Development Assets. Dev Tools seems to work great. I launched via my new icons and after a few updates --- for runtime, VS 2013 isolated shell, etc. --- things appear to run great. I get the pop-up for ModBuddy, the Steam Uploader and FireTuner and all appear to run fine. Was surprised that there was not a WorldBuild link, but if I use Gedemon's trick with the "new" Civ6 FireTuner things appear to work great. https://forums.civfanatics.com/threads/how-to-launch-the-ingame-worldbuilder.600327/ Dev Assets does not work great. Is it even supposed to? If I try to launch via my new icon, I get the following error: I get the following error: An error occurred while updating "Sid Meier's Civilization VI Development Assets (invalid app configuration) See the Steam support site for more information" So... how do I solve this problem? Any suggestions?