Currently it is not possible to configure click on the icon to open Notes Browser in Notezilla . Thanks for asking. I will take note of this request.
You can easily access memoboards faster by assigning hotkey to the required memoboard so that you can quickly view your To Dos. To set a hotkey, go to Notes Browser, then again right click on 'Home' memoboard in the left tree view & choose 'Properties' from the menu.
By the way, we have already set a hotkey by default Ctrl+Shift+Q. This hotkey opens the Notes Browser with Home memoboard by default.