Try something simple

https://isboxer.com/wiki/Mapped_Key
Create a new mapped key, name it 'everyone jump'. Where it says Hotkey open that and choose G5 from the drop down.

https://isboxer.com/wiki/Keystroke_Action
Then in step 1, make a new keystroke action to send 'space' with target 'all w/ current'

Save | Export | Load team... confirm all toons jump when you press G5

Then change hotkey selection to G6 | Save | Export ... check if now G6 makes them jump