Hello,
Based on the information that you provided it seems that you have the EVKB-RT1050 evaluation board. But the SDK that you downloaded is for the EVK-RT1050 board, this SDK is for the first revision of the EVK which you don't have. The proper SDK to download is the following:
victorjimenez_0-1607971500212.png
Once you download the SDK you will also need to download the SDK documentation. Within the documentation, you will find a file named Getting Started with MCUXpresso SDK for EVKB-IMXRT1050.pdf. This file will help you to get started with the SDK.
victorjimenez_1-1607971527154.png
Regarding the application note that you mentioned, we provide an example project for this app note as well. You can download it from the following link.
Regards,
Victor