Project Manager - Double Clicking?

[pieman]

Is there any reason I must double click files to open them, rather than single click? I'm not sure why this is because I can't seem to reorder files anyway. :/

[Folco]

I never asked about that, but I wonder about for a long time, I have never understood why a single click isn't enough

[MortenMacFly]

Yes because you can multi select files for different operations.