I still can’t start it on my pc. I uninstalled, updated, and installed again. This was after the update on Friday. I ended up using my Mac laptop. So far no problems there!
Support gave me the heads up my problem was to do with the sound card. I actually had nothing plugged in on the PC I use and plugging a jack to jack cable in to the green socket (audio out normally) and fooling the PC into think it had headphones connected allowed Zwift to launch. Result.
Had no issues with Windows 10–used my Surface when Zwift wouldn’t start on the Mac connected to the TV. But the screen on the Surface is so small.
On Mac OS X 10.7.5 “ZwiftApp quit unexpectedly” after entering password. I tried uninstalling and re-installing but I don’t think all of the files are cleaned up on a Mac when uninstalling because after RE-installing I got the message, “Welcome back Jeremy”. Tried uninstalling / restarting / downloading / reinstalling like 3 times.