We currently have a very nice "reset global variables" action in C2 & C3 which probably exists to make it easy to implement a "return to menu" functionality into our games. Sadly this is only half the battle, as every group currently keeps his current status (activated or deactivated) causing huge bugs if we don't set all of them back to their default status ... manually. For big projects which have hundreds of groups, this is a big amount of work, and of course any mistake is hard to spot and will lead to bugs.
A simple "reset all groups to their default status" action would really help.
forum reference : https://www.scirra.com/forum/viewtopic.php?f=147&t=198157