I went to install a new ap, and Loader said the only option I had for BB Messenger was "downgrade". I did that and it disappeared from my phone. I reloaded OTA, but how do I avoid this in the future?

I also have BOTH BB Messenger 4.7 and 5.0 LISTED in Application Loader...not on the handheld however....

Are both checked in the Loader? If so, uncheck 4.7.

I will check on that...thanks. However if I've loaded software through loader, but subsequently upgrade OTA, do I need to get the alx file off my desktop computer to prevent this kind of stuff?