The current method for installing AltStore doesn't work. Alt server has no option to "Install AltStore", only to "Sideload .ipa" which is impossible for installing AltStore because there's no .ipa file provided anywhere.
I apologize. After reading the changelog, seems like this happens when you Shift + click the tray icon. If you simply click the tray icon, the option appears!
The current method for installing AltStore doesn't work. Alt server has no option to "Install AltStore", only to "Sideload .ipa" which is impossible for installing AltStore because there's no .ipa file provided anywhere.