OK I just read that thread. The virtual machine files are named ".vmwarevm". The extension is hidden, but it doesn't help if I make it visible. Inside the package, the main file is named ".vmx." I tried renaming that one, and then it can't find the virtual machine. So I changed it back, and it sees the VM but it just sits there saying "loading…" and never does anything.
I have read others saying they had no problems on MacUpdate, so maybe I'll try reinstalling it.