OK, thanks. Yes the CAT files are zipped, and if you had your Windows system set to "show file extensions of known file types" you would have seen the .zip. But anyway, you figured out that they need to be unzipped.

But I thought you said you knew how to use a CMD shell... and that you had 7ZIP. If so you should have been able to change to the directory containing those zipfiles and with a DIR command seen those zips.

7za x *.zip

should extract them all resulting in the enclosed CAT files being there, then

del *.zip

to get rid of the no longer needed zipfiles.

Anyway I'm glad you got going.