Make Dia not start multiple instances?

[christian ridderstrom gmail com]

Is there a way to keep Dia from starting multiple instances?

When it will (again) be possible to double-click on a .dia-file to open 
that drawing, I wonder if there is a way to prevent dia from starting 
multiple instances. 

regards
/Christian

-- 
Christian Ridderström, +46-8-768 39 44               http://www.md.kth.se/~chr