Daiz
I though it should create another plugin if the ACE is not compatible, like the actions had been removed. -- It will cause the capx be locked. (could not open the capx file)
User need to keep the older plugin, open the capx, remove the un-existed action(or condition,expression), save it, then update the plugin to new one.
It is easy to keep compatible by setting the ACE to depressed. (without remove it)
Well, it's just another problem about maintaining plugin.