When you use the the printer scan buttons, the printer's LCD display will show: "select computer" and an arrow pointing to the right, and when you press the right rocker switch to "select the computer", nothing happens.
I tried uninstall and reinstall of thee full software package which is over 300MB and includes a lot of things I did not find useful and the result on the printer's display was the same.
The best thing is , in order to get your scanning working again you don't need additional software.
You only need to enable the webscan option:
(source): Follow the steps below to enable Webscan in the EWS.docx 409 KB
Check your IP address of the printer, in my case it was 192.168.1.22 and you add that into your browser and you will be presented a webpage that shows on the left side the option to use Webscan: