I'm glad to hear we were able to help!
I assume all hosts would need upgrading if the viewer is upgraded? Also, does this upgrade keep all settings and configured connectons so it's just a simple install of the beta2 host and viewer versions?
We recommend to always update Viewer first and then update Hosts, but in small groups (or try updating 1-2 Hosts prior to updating the rest of them), rather than all of them at once.
Yes, it's advised to update all of the Hosts to the same version as Viewer to avoid version mismatch - we still provide as much backward compatibility as possible, however some of the features (especially new features or bug fixes) might not work as expected.
Regardless of the update method you choose, Host's settings from the previous installation are always saved and carried over to the updated installation (unless you use Advanced Update method along with a custom MSI installation file). Viewer's settings and connections in the address books are always carried over to the updated version as well (unless you explicitly remove them from your system as described in our complete uninstallation tutorial
For more information please see our guide on updating Remote Utilities
Hope that helps.