Updated
(Correction: They now have a CC 2017 Release Candidate you can download and use. They say it hasn't been as tested as normal, and isn't the official release, but it should get you back up on your feet and running, though potentially with some errors. Visit Important Update - CC 2017 to find the download link)
Astute Graphics hasn't updated the Unified Installer, or the plugins, to work with Illustrator CC 2017 as of yet. See their blog post (Important Update - CC 2017 ) and this tweet exchange from this morning:

As Jacob mentioned above, it might be possible to manually copy the plugins from the existing folder for CC2015.3 (C:\Program Files\Adobe\Adobe Illustrator CC 2015.3\Plug-ins\) to the 2017 Folder (C:\Program Files\Adobe\Adobe Illustrator CC 2017\Plug-ins), but there's always the possibility that things a) won't work as expected, or b) won't work at all, or c) will break/corrupt your files. I'd have to imagine that if all the plugins worked as expected, AstuteGraphics would have already released the new installer, as the release candidate and SDK have been available for a few weeks already.
Hang tight, my friend - it'll be here when it's here. :-)