The files listed below below may be downloaded from here.

It is easier to download and install  CalswrSetup.exe.
This installs the Calswr program structure, help screens, documenetation and the Picswr pic code.
All the files below are then in  C:\Program files\G3VPX\Calswr\hardware

Layouts and schematics are produced using Pad2Pad which is a PCB layout program.
The   .pcb files can be edited if you download a free copy of Pad2Pad.
The .pdf files were generated by printing from Pad2Pad to Adobe Distiller which will generate PDF files from any printer output stream.