Hooray - jimroe's tip about editing the alx has me back in the chronographin' way.
I did retrieve a copy of the desktop install from Pinstack (search for Chronograph) and the alx file was missing the '.cod' extension in the <file> section. Added '.cod', reconnected, and we're away.
Amazed that there aren't more timer apps out there. This is a pretty basic programming exercise. Might give it a try myself