If I could attach a zip file, I would post the ExpressPCB file. I assume that changing the extension on a file to an allowed type is not permitted, otherwise, I could attach the file and then you could download the file and rename it to the ExpressPCB file. ExpressPCB is free software that you can download to create schematics and board layouts. I use CuteWriter (free software) to convert anything that can be printed to a pdf file.