To upgrade to the latest beta you must be on our new licensing system. If you are not on the new licensing system, or do not know about the new licensing system, please open a support case for that.
To upgrade to the latest beta:
Download and save http://download.socketlabs.com/hms/setup.exe
Run the setup.exe with the following parameter: /beta
This will upgrade the software to the latest beta build.
Release notes can be found here:
Updated about a year ago