This app is very, very, useful and people need to use it. NUS Downloader, or NUSD, is a PC Utility designed to allow easy access to the resources present on Nintendo's Update Servers. Using this tool, you can download, pack, and decrypt many system titles into WADs ready to install.
Download ---> NUS Downloader
- Keep the database up-to-date [there is an update option]
- click the Database button
- select the file you want to download
- tick "Pack -> WAD"
- tick "Decrypt"
- click "Start NUS Download!"
- install the wad using wad manager