Crash if double-click on a .ded file

[peak]

Dr Engrave 2.72.
As the subject says, if I double-click on a .ded file a window flashes "Filling in progress" and then nothing more happens. No content is displayed.
However, if I drag the same file to an open Dr Engrave window it opens ok.
This happens both on an old XP and on a Windows 7 computer.
Anyone got a clue why the program behaves like that?

[Kai Perry]

Could just be a glitch with the file opening, strange that it happens on two versions of Windows, what version are you using for an Installer?