Input Signal Out Of Range Change Settings To 1600 X 900

Although we use Acrobat Pro extensively in our organization, we do not use any Adobe Cloud features. When Acrobat Pro DC came out, we upgraded. However, we are presented with a page displaying Recent PDF files that only clutters our Desktop. I have looked all though the Acrobat Preferences and can't find a setting to turn this page off. How can I stop this page from appearing at startup? Rob