AS4.12.6 is a full install, for some reasons like cyber security… (Latest AS 4.12.6 as upgrade?) So to have AS4.12.7 you need to:
- uninstall current 4.12.X version you have
- install 4.12.6, please take care about installation path, default one changed.
- upgrade to 4.12.7
Hope it’s more clear 