del1ter, are you getting an error message of any sort?
You might need to go into the folder on your PC and delete a file in order to get Desktop Manager to recognize it.
Please navigate to C:\Program Files\Common Files\Research in Motion\AppLoader on your PC
At the very bottom you'll see a file called "vendor.xml." Go ahead and delete that file.
Now, with your device connected to the PC, in that same folder towards the top, you'll see an executable called Loader.exe (it'll have what looks like a little phone next to it). Double click on that and see if the update doesn't work for you now.
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. Thanks!