**sorry, topic should read CAN'T load saves...

I am getting the message that all of my saves were created with a later version of Skyrim. I don't understand as I have not deleted anything from steam. I was just playing a couple of days ago. Since then, I've done nothing except download the Nexus Mod Manager. However, I never used it or downloaded any mods because the manager is bugged and doesn't recognize my login info (login works on nexus site, just not NMM).

However, as far as steam goes, I've changed nothing and deleted nothing. Can anyone help?