Hi,
you need to delete the PlaMaker folder, that's the cleanest way, but be carefull, if you have templates of global variables, they are defined inside the PlayMaker folder, so move them out and then you can clean up ( templates are in Templates folder, and there is a global resources file as well if you have defined global variables).
When you project has errors, the PlayMaker wizard won't kick in, so you need to manually install it, the package is in PlayMaker/Editor/Install/
Bye,
Jean