I am somewhat luckier - Geppetto is completely unusable - I can click on Create Crowd, but then even hovering ACROSS any other People buttons causes an error like you are seeing with the script box popping up.
The FIRST error window I see says that it has displayed more than the maximum error messages...then error after error that I click OKAY on until all are gone, then if I try to close the script window that pops up, I have to go through ALL the error messages again. The only way to stop it is Task Manager kill Max. As you noted, I can minimize the script window, then I have that sitting there forever doing who knows what.
I have no idea IF it's doing more damage, but it's clear that what I would like to have now is a complete UNinstaller for this....is there one? I've learned my lesson, so if someone could please talk me through completely removing this from my machine I'd appreciate it.