Hi Maeve,
I can’t leave a link here on the forum since the website contains sensible informations and is private, but I would be able to do so via private message.
WordPress version: 3.5.1
Plugin version: 2.1 Pro
Here’s what I’ve tried so far: deactivating all other plugins, delete and reinstall of the plugin complete with empty tables in the database…
UPDATE : I’ve just realized that it is a browser based problem… but only for this website (installed on another website without issues). Weird. It doesn’t work in Safari and Chrome, but it works in Firefox…