it's May 2023 and I still use this app in macOS to check if an nsp is signed and safe (:
If anyone has an alternative worth looking into, please let me know
now that I'm at my computer, you'll want to rename sxos to atmosphere and titles to contents. Then the folders should look like this
atmosphere
└── contents
└── 0100000000010000
└── romfs
├── EventData
├── LocalizedData
├──...