If you are looking to combine the base game and the update into a single file for easier installation, you can use tools like (Switch Army Knife).

: Place the NSP files in a folder on your SD card. Open Tinfoil , navigate to the folder, and select "Install".

For users with an official copy of the game, updates can be managed through the standard system interface:

Are you trying to specific gameplay features within the update, or just looking for the best tool to install it? Nintendo Switch NSP Combination Install Tutorial

: Enable this in System Settings > System > Automatic Software Updates to ensure the game stays current whenever connected to the internet [ Nintendo UK Support ].

: Ensure you have your Nintendo production keys in the tool's bin folder.