So I downloaded the x_64 core..Running win7 64 bit..It tells me updates are available, but when I try to update megui crashes and I get this error msg...

Fatal error
---------------------------
MeGUI encountered a fatal error and may not be able to proceed. Reason: Could not load file or assembly 'ICSharpCode.SharpZipLib, Version=0.85.5.452, Culture=neutral, PublicKeyToken=1b03e6acf1164f73' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)


I have searched the forums and google but can't seem to get this working..Anyone have any clues?
Thanks in advance