I'm having the same problem. When I look at the plug-ins in Outlook 2010, I see the Evernote.Outlook name, but the locaction is empty. There is no path to the DLL. After clicking manage COM Add-Ins and then highlight the Evernote.Outlook plug-in the load behavior says "Not Loaded. A runtime error occurred during the loading of the COM Add-In." I've tried uninstalling and reinstalling a couple times, making sure that Outlook was not running. I also tried to manually add the plug-in (EvernoteOL.dll). Nothing has worked. Any ideas?