muse hub won't download with new update

Hi,
, I'm trying to update to version 4.0 and it's telling me that Muse Hub is having trouble connecting
and that I should try checking my internet connection or my firewall settings. my internet connection is fine, and I think my firewall is, too, but I'm not sure about the latter. Do you have any suggestions to help me?
Thanks very much, I love your product and have been using it intensly for over a dozen years