Finding Sworm Version:

To find which version of Sworm you are currently running, simply start the game.  Once in the menu, look to the upper left of the screen.  You should see a version number like this:

That number is the version number of your currently installed Sworm.  Alternatively, you can view the game credits (the version number is repeated there).

Can't see a version number in the menu?  Then, you are running Sworm 1.0.1.