What version is the program file?

Question

Is there an easy way to tell from the program file what version it is? I tried right clicking the file and selecting Properties, but couldn't find it anywhere.

Neil Challinor · Accepted Answer

In more recent versions, you can see what format the routine was saved in on the Save As dialog... 
 
 Prior to that, yes, you'd have to try progressively older versions until it opened.