It's always EMCtools and EMCdata (not ETCdata nor ECMdata). Maybe I typod it somewhere in a post or *.txt as well.
1) These files work under Windows, Ferdinand has just recently published images on MSG-1.
2) Do you have at least a S3A.png or S3B.png in the respective tmpdirs???
2a) If not check the environment variables part of the installation HOWTO. At the prompt command " echo %PPP_CONFIG_DIR%" should not be empty!
2b) If yes check that you have made the subdirectory ...EMCdata\logos and copied the two image files from the Sentinel-3 Update there.