Yep, Windows is at last turning SMB1 off on new installs.
Any TeraStation from the current Generation or the previous generation supports SMB2, and the current supports SMB3.
The system is no more or less secure than it was before the update. It's just now, Windows will refuse to negotiate an SMB1 connection by default. There are currently no known exploits, but they will likely use this as a reason to simply stop patching it if one is found.