When we upgraded to Windows 10, the embedded "Office App" has Word with a Clip-Art search that cannot be filtered by CE. I contacted CE by phone and support said there is no way to filter apps. :(
We were very discouraged and were crippled by the gap in filtering. But we limped along, in prayer and in research.
Here is how we solved it.
1. Installed Word 2010.
2. Removed/Hid Office apps (and others) using this method (scroll down to Power Shell). http://www.makeuseof.com/tag/easily-remove-bloatware-windows-10/
3. Added these addresses to the blocked list under the Covenant Eyes user's filter.
Please test this method and see if it works for you.