.kicad_pcb files will not open

[sobellinni]

I just installed kicad but every time I try to view one of your boards it complains that my kicad is not up to date, I have version 4.06 64bit windows

[sobellinni]

I found out that Kicad version 4.04 and later will not open the PCB files unless references to diff-pair are removed in the ascii file

[LubOlimex]

You need to use the latest nightly development builds of KiCad to open the design files without problems. We don't use the stable release but the newest available release of KiCad.