Update problem

Hi! I've got Catch Base Pro 3.8.2 installed in my WP 4.8.1 installation. WP claims that there is a 3.8.3 update available, but if I choose to update, I get an error saying that the update package is not available (I get it in Swedish, so I don't know the exact phrasing of the error in English). How do I resolve that? /Johnny J.