Installed latest 2016.44 and immediately tried the color curve.
I right click on a color and it chugs for a bit, then pops up this error:
21:42:40: Cannot enumerate files in directory 'C:\Program Files (x86)\Google\CrashReports' (error 5: access is denied.)
21:42:40: Cannot enumerate files in directory 'C:\Program Files (x86)\Google\CrashReports' (error 5: access is denied.)
Next, I go to that folder to see if it exists - it does, but needs Admin approval to open, then says it is granting permanent access permissions. Using Win10, 64bit.
Now I don't get that error when using color gradient.