I can confirm that reinstalling with the downloaded .exe installer does fix this issue, might be a problem with the Hub's version of the installer.
Same here, I ran into this the first time I installed CC3 through the Hub and again since I reinstalled using the Hub again.
The first time I had to uninstall and reinstall using the downloaded .EXE instead and every thing worked fine until I wanted to migrate my content to a new drive, it's just faster to uninstall and reinstall giving the new drive location for my content during the install. Now I'll have to try again to reinstall using the .exe instead of the Hub because I cannot save anything at all except the project through the "File Save As" menu selection.
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