My files have stopped synching

I often work from home and this week I tried to access my files and they have not synched since Dec 9, 2015. So any work I did past then is not available at home. The files created up to that date are all there and It says everything is already synched, but they are older versions. I have quit cloud and re-started. I have signed out and back in, but neither has prompted it to synch. How can I get this to start working again. At home I did update the apps recently. Any known issues? If so, any fixes? I often get stuck working late at night and I would rather do that from home than the office. I searched the forum and found a similar question but the answer was just a reference to 2 old links that did not help.