07-27-2009 10:06 AM
Hello and welcome to the forums!
Your best bet for retrieving your BlackBerry Messenger application is to use the web-based software loader as outlined in this post. Make sure you have the backup option selected under settings labeled #2 below. If you choose the options button as outlined below you will see that BlackBerry Messenger is there and should be checked if you would like to install it again.
hope this helps
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