Hi Gary,
When you download the latest version of the Media Configuration Tool, be sure to read the instructions that accompany that file carefully!
It sounds like you have the correct files saved - but just double-check...!
I went at it like a bull at a gate (I didn't save the previous versions files) and am now unable to use the CNWIMCT to create new media files for my 8400.
I now use the "Special" settings as per the paper manufacturer's instructions which is not ideal but, to be honest, I cannot tell the difference.
I will be interested to hear how it goes...
Regards
William