We're sorry to hear about the difficulty. The first thing to do is to make sure that you have at least version 5.7.1 of Kontakt. You can use the Native Instruments application Native Access to download the latest version of Kontakt. Once you've done this you will be able to activate ANALOG BRASS AND WINDS and load it within Kontakt.
Note: When updating your Kontakt version, please make sure the standalone Kontakt application is closed, as well as any instances of Kontakt within your DAW. It's best to simply close your DAW when updating Kontakt.