My Xcode config is definitely damaged. Unfortunately reinstalling it doesn't help, as the problem seems to be in the user configuration outside the install. I deleted the "xcode-beta" application, and installed a new one from the Xcode_14_beta.xip. But when I started the new install up, it listed iOS 15.5. versions of all the simulator target devices, and didn't offer the option to download iOS 15.5. So, the question is: what user data needs to be deleted for the full uninstall?