We did a lot of effort on reconstructing Core Tunnel, and it is now on Mac App Store! 
As of version 1.1.2, it contains all functionalities in version 1.0, plus Sync and AppleScript features that promised in version 1.0.
All existing 1.0 users will receive an email contains a lifetime premium license of App Store version.
I must say thank you @jooize, your suggestion inspired us and helped us to find out a solution that finally makes Core Tunnel could landing App Store, while without sacrificing a certain level of feature or function.
I hope you won’t mind that in next update, we’d like to add your name to “Special Thanks” in About window.
Thank you again for your inspiration! 