In version 1.11.0, I could double-click in windows explorer, or type "qmpashack.exe file.gpx", and the file would appear in QMapShack, even if QMapShack was already running.
When I try to open a file by the same method in v1.13.0, nothing happens.
If QmapShack is not already running, then file(s) specified on the command line/shell command are correctly opened.
I am on Windows 7.
This might seem minor but is a major disruption to my work-flow. I tried to re-install v1.11 but it doesn't seem to be available anywhere.