If you upgraded your operating system, you will need to re-download the updated drivers from its official website. Most likely, you have downloaded the drivers for printer, but on the website there is another section for scanner downloads. You need to download that package related to 10.9.1 version of MAC.
The filename is:
mc1690_Scanner_Mac109.dmg (4086 KB)
Note: Remove the software and previous installed drivers before to install newer ones.