We managed to solve it, though I'm not sure HOW this worked. Here's how she explained the step that solved it:
10:22 AM - Her: i fixed it
10:22 AM - Her: i was uninstalling the driver after uninstalling hamachi
10:22 AM - Me: awesome. what was the step that fixed it?
10:22 AM - Her: by uninstalling it while hamachi was running then reinstalling hamachi it fixed it
10:23 AM - Her: ie do stuff retardedly backwards
... man, networking is weird. Posting this in case it helps someone else...