I have the SkyDrive app for Mac otherwise correctly installed and running on my iMac.  In the Preferences, I keep having to check the box to "Open at login," but it keeps periodically forgetting this setting.  Not every time I boot, but seemingly randomly.  I cannot detect a pattern for when it will forget this setting.  The problem occurred when I was running OS X 10.8 and also does now under 10.9.  I have uninstalled and reinstalled the app and it still happens.  Any help?