Go to Finder > right click your project file > Show Package Contents > Images Find the image you want to change and change it. Be sure it has the same name.
Are they all different prototypes? Are they all instances of the same prototype? You should be able to just drop the image on the prototype to change all the instances.
Comments
Find the image you want to change and change it. Be sure it has the same name.
You should be able to just drop the image on the prototype to change all the instances.