After upgrading, you can continue to use SmartSDR for Windows v1.7.30 as there was no firmware update either. Usually, we would release all three components of the SmartSDR ecosystem together, but we needed to push this out today.
I this case it should be your choice since the new version ( .32) contains no new user features or bug fixes compared to the old one.. When your get your Maestro I would run whats on it to get the feel and then when your ready to see how the update feature works load the new version.
The 6700 radio firmware does not get updated with this release, only the Maestro unit. This has no new features or bug fixes for the Maestro but affects new units being built in the factory only.
Wouldn't hurt to keep the Maestro up to the latest release as if you need assistance it helps tech support when you are running the latest software.