comptability issues with Windows 10

I wonder if rolling back a step or two would be worthwhile in the short term, at least you'd be able to work while troubleshooting continues on the "latest and greatest".

You can leave CC2017.5 installed while also installing an older version that you can (hopefully) use. Or you can roll back to whichever dot release of CC2017 worked for you previously.

As a Paid CC Subscriber, you have access to 8 versions of the program through the CC Desktop App and can have 5 of them installed (the CC2017 versions will overwrite each other) on the same computer(s) at the same time under a single account, they just won't run concurrently.

To do that...

1. Open the CC Desktop App and click the Apps tab
2. Scroll Down to "Find Additional Apps" bar and click the blue link on the right side of the bar

3. Choose "View Previous Versions" (the bottom most option in the pop up menu)

4. Click the DW icon under the "Find Additional Apps" bar and choose CS6, CC, CC2014, CC2015 or one of the prior dot releases for CC2017
5. Click Install

In the future, when you install a new version, make sure to click the Advanced Options link in the installer dialogue and uncheck the "Remove Older Versions" checkbox. That way, unless it's a dot release, it will leave the older version installed, just in case something like this happens again.