JimMooney1:
How is this done?
Download the new version and unzip it to a convenient location.
Do I need to uninstall the old version and completely reinstall the new version.
No. Older versions and newer version can coexist without problems. For no particular reason, I have five older versions on my computer.
How can you even tell what version is available?
http://arduino.cc/en/
...click Download...