All you have to do is open your Connections tab. It is right between the Library tab and the Monitor tab. Then click on a host to highlight it. Then hit the browse button at the bottom. If it gives the error pop up you will need to remove that host. Just click the remove button to the left of the browse button. a new host will appear. Continue doing that until you have three good hosts and you will be fine until another bogus one sneaks in. Then you will have to repeat the procedure.