Can't delete Popup in Popup Pro

Hello, I'm trying to delete a popup in your Popup Pro plugin, but the plugin won't allow it. I only get the response 'You are not allowed to move this item to the Trash.'

The popup I'm trying to delete is deactivated and I am logged in as an administrator. I tried logging out then in again, to reset my credentials, but that didn't do anything.

I also tried creating a new popup just for testing purposes, to see if this was an isolated issue. The plugin would not allow me to delete that one either. I now have two popups I'd like to put in the trash.

This isn't a huge deal, because the popup is deactivated properly and not displaying to clients, but I'd like to clean things up admin side.