How to configure which Blender version opens when clicking on a .blend file? If I double click a recent blend file icon, the version of Blender that it calls is an old one.

The file was created using 2.76, but if I double click it it runs inside 2.72b.

If I right click it and navigate to 2.76, it still opens with 2.72b... or at least that is what I think it did. Am I imagining things? (I have just tested and that is what happens)

If I double click the 2.76 .exe it opens 2.76, but if I go to the file icon, right click and then navigate to the 2.76.exe it opens in 2.72b

I have 2.72b in a completely different folder called ART. 
2.73 and 2.76 are in the normal Blender Foundation folder right next to each other. So what is causing the system to jump to another folder to open 2.72b?

This isn't a problem, but seems bizarre.

EDIT: Windows 10.  Yes, it is probably the O/S that is doing this, but it may mean that others have downloaded updated Blender, not overwritten the old install and are using the old version without noticing it. (It was a few weeks before I realised what was happening). 

The thing to remember is to open Blender directly, check the splash screen and then File>Open.. the blender file. But finding the right version's icon is also hard because they don't include the version number in the icon. Perhaps it would be better if the icons change with each stable install the same way the splash screen changes.

I think I may decide to uninstall the old versions and see what happens.
For Windows:
On windows 7 right click on any .blend file and select open with and choose default program . Then use the browse button to navigate where the version you want of the blender program is on your hard drive, and select blender.exe as your default program to open this kind of file. To make the selection permanent check the box that says  always choose the selected program to open this kind of file.

On Windows 10 right click on the file and use choose other app:

Then on the next screen navigate all the way to the bottom and click on look for other app on this PC

On Linux it's basically the same procedure:
Right click on the blend file and select Open with other application

then from there navigate to the folder the blender version you want to use:


On OSX
Ctrl Click on the icon and select open with-&gt;Other and select the blender executable you want to use.