Step 1: Finding the Current Homepage

Login to your Joomla site administrator area and hover your mouse over "Menus". Click on whichever menu has the star beside it.
Step 2: Finding the Current Home Link

Look for the link that has the yellow star in the default column. That is your current homepage.
Step 3: Changing the Homepage

Check the box next to the link that you would like to be the homepage and then click "Default" in the top-right corner.
Step 4: All Done!

"Joomla License" is now your homepage.