The App Store® icon should show when updates are available to download on the device.
When there is an update available, the app store icon will display a number on the right hand corner of the icon.
Note: if using a Dedicated System, see article, "Connecting to a Computer for the First Time"
To perform an update of the TouchChat app in older versions of iTunes:
Go to the Apps section of iTunes®
In the bottom right of the screen, there is an option to “Check for Updates”
Enter in the Apple® ID that you purchased TouchChat or TouchChat HD with previously
Check the version number of TouchChat:
From the home page of the vocabulary file tap Vocab in the left corner
tap on Choose New Vocab
the version is at the bottom of the screen