From after upgrading to v4.0.4 and V5, the Sighthound "Check for updates" function does not appear to work. After selecting, a dialog box appears:
"The update server could not be reached. Please ensure you are connected to the internet and try again."
There is no 3rd party firewall installed, the macOS 10.12.5 firewall is disabled.
All other function under the help menu on Sighthound work properly, including the License information.
Manual download and installation of updates works.
Local and Remote access using the iOS app works.
macOS 10.12.5
mac mini Late 2012 core i7
16 GB memory.
