I can see the abstract files in three places on my Windows 10 system. Bearing in mind I have several versions of Photoshop installed.
C:\Program Files (x86)\Common Files \Adobe\Color Profiles
C:\Program Files\Common Files\Adobe\Color\Profiles
If you can find them in any of those locations try copying to the others.
If you are on a Mac, then hopefully a Mac user can advise
Thanks, Dave, that was very helpful!