The Deluxe version of this software features a Mail Merge option to use your address labels. However, there is no mention of the Express version. But from my understanding regarding these Express versions, it's possible that the Mail Merge might be missing. Usually, the Deluxe versions offer more features than the Express one, or at least this is the case for Hallmark Card Studio series.
You can give it a try using the following link: http://usa.novadevelopment.com/hcse5/Walmart/HP/