After updating Photoshop CC (19.0) to (19.0.1) the About box and Help > System Info... still display "19.0 Release."
To verify you have the correct version installed, launch Photoshop and select Help > System Info... The System Info dialog will display "20171103.r.190" in the first line of text if the 19.0.1 update has been installed.
Alternatively, on macOS, select the Photoshop app icon in the Finder and Get Info (cmd + i ) to display the general information. The version should be displayed as 19.0.1 if the update has been installed.
On Windows, right-click on the Photoshop exe icon and select Properties and go to the Details panel. The File version will display 18.104.22.168687 if the update is installed.