In case the application has recently been updated and it is on version 4.10 and stuck on the following screen:
Try to completely close the application on the system tray:
And manually restart the Block 64 Discovery Service:
If the following message appears, you should be required to uninstall and reinstall the application:
To reinstall the application you can follow the steps found here:
How to reinstall the Block64 Discovery Application without deleting the database