FWIW, CFBuilder in VSCode is still unable to add a server. Multiple things tried:
• Uninstall/reinstall VSCode as user = nope
• Uninstall/reinstall VSCode at system level = nope
• Uninstall system level, reinstall VScode as user, uninstall every extension = nope
• Uninstall vscode, rename ".vscode" folder under c:\users\<profilename>\ directory, reinstall VSCode, install CFBuilder extension = nope.
All in all, just plain nope. Got it working on my other computer, but this one is just D.O.A. for adding a server.