Installing Sketchup 2013

Yes that is only the Pro edition.

Here you can find the latest SketchUp 2014 Make edition links:
SketchUp Make 2014 Download Links (provided here)

Try to use v 2014 or higher (if you can,) as they use Ruby 2.x. All older SketchUp’s use Ruby 1.8.x which is beyond end of life (and no longer supported.)

If you need a specific language build (other than English,) send a request via private message to AlexB.