Yea the design of this program is pretty trash, I want to clean it up eventually. open is Ctrl-O, and I never animated the wire drawing but you can just use right click and drag from one card to another to wire.
EDIT: If you like the concept of this program I would suggest master plan by SolarLune, although its paid its way easier to use, the only thing nut note has over it is the scripting, but even that is kinda not worth it.