Thank you for the details!
1. I made a change via FTP, so it should be now visible on any custom post type. I will probably add an option for that in the future.
2. Unfortunately there is no re-set filter button yet. The only possible way is to re-fresh the page. Maybe you could simply add a link that points to the same page, so reloads it, as a temporary solution?
If you like my products, don't forget to rate them on codecanyon :)