Regarding Microsoft pushing out Windows 10 upgrades:
After upgrading OS to Windows 10, the system UUID will be changed. This causes some issues with Splashtop Streamer - users will see duplicate entries for the Streamer computers (one for the old pre-Win10 UUID and another for Win10 UUID).
In our next release of Splashtop Center, we will add a function for administrators to manually remove unnecessary offline Streamers. So admins can clear out these duplicate Streamer entries. Expect this update to be available early September.