This is my last post on this topic, because I've really got the impression you won't understand what I try to tell you, however hard I try...

The standard open file shortcut in finder is Cmd + O (Cmd + Down being just an alternate shortcut, working without any garantee it will still work in next version)... So, when you say that you changed the shortcut from Command to Command+Control, you should really precise that you only mean to support the Command+Control+Down shortcut, and not the Command+Control+O shortcut, which should have been the normal one.

Again, I repeat the old "command" only shortcut was at least as fine, because even though it needed the user to release the command + O (or down) shortcut once he had pressed those in the finder, it didn't disabled any shortcut. This means both Cmd + O and Cmd + Down worked, and the same with the Cmd key being kept pressed worked for direct extraction

Now, this new shortcut you chose disables the use of the standard combination, Cmd + O if you want to direct extract a file.

Well, now I get it... Next regression I have to face with BetterZip is gonna be the last one, & I'll definitively have to find another software, or code it as a free alternative, and well, too bad for my licence fee...