I installed SW2013-SP3 on my laptop which already has SW2012-SP5.  When using 2013, if I Edit Material to select a material for new part or change material on old part, I get an error message telling me "Access to c:\blah\blah\blah\dull.sldclr was denied."  (Yes, I have full admin privileges on my laptop.)  I added the path to Materials File Locations for both the "Solidworks" (2012) and "Solidworks (2)" (2013) folders, but that didn't work.  Using 2012, I don't have that problem.  Any suggestions?