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Welcome to the forums. This update should work (did you delete the vendor.xml?) However, after the update you will need to reactivate on your BES. If Desktop Manager doesn't have an online connection to your email profile then you will need to get an activation password from your BES Admin. If desktop manager has a connection to your email server then Activation will start automatically a few minutes after the update is complete (just leave it plugged in until it starts..)