You can find the App Store inside the iTunes Store. Click iTunes Store on the left hand side of the iTunes window. Then click the App Store category in the iTunes Store window. You can use the iTunes Store to download music, movies, TV Shows, and more (availability of certain types of media does vary by country). To change countries, scroll to the end of the iTunes Store home page and click the flag indicating the current country. To choose a different country, click the appropriate flag.