Ok heres what I did. I uninstalled and reinstalled 4.3 so I would still have Vendor.mxl. Made sure 4.5 was gone. Still no luck though. I also read somewhere that temporary files may be an issue, so I cleared out my temp folder on my pc. And as I was attempting the loader again I had the temp folder opened and noticed that a new text file named "Loader-(2009-11-17)" appeared. Is this significant?