This has happenened twice now, the first by accident and the second time was to attempt to find the problem. When trying to erase multiple items on the world map by clicking and dragging the eraser, the editor will freeze and have this message appear:
The editor has stopped working.
Check for a solution online and close the program
Close the program
Not sure if this bug has been nullified or noticed and reported yet, but it happens only in the world map editor. I'm using PGE v0.2.1.