I was trying to update my version of the plugin, deleted the old folder and FTPed the new one, but got one of those WP error messages that are lines of text on a white page. I had to uninstall the plugin to get back to my admin so I can't add the error here, but I emailed you guys via the contact form earlier today.
I believe it said the file "eStore_classes/_loader.php" was missing or not found. Something along those lines.