Where is the word-list kept?

When I learn new spellings for words, where does Scapple keep the custom wordlist? In Scrivener, it’s kept in the Users\UserName\AppData\Local\Scrivener, but there’s no corresponding directory for Scapple.

I back up the custom word-list for Scrivener periodically so I don’t lose all the custom spellings if I had to reinstall (this happened before). I’d like to do the same for Scapple, but I can’t do it if I don’t know where the word-list is kept.