Offline NC-GIXC

offline is a good way to keep your nxgic folder clean and prevents it looking at the entire icon repo everytime you load up, you can manually add updates and your own icons

Download and extract NX-GIC

Make a new Folder Called Main

open nx-gic and select Work Offline

File > Work Offline

Now Download a release of the Game Icon Repo

Open the freshly downloaded zip and navigate into the zip

extract or drag & drop the Vertical folder from Inside the zip file into the Main folder inside the NX-GIC Directory

Be sure the structure is correct inside Main/Vertical/ folder

info

refer to online guide for Setting up NX-Titles-Dumper if you run into and problems

Download NX Titles List Dumper and place the .nro into the sdmc:/Switch/ folder on the SD

load nx-titles-list-dumper from hbmenu

press to dump your installed title IDs

this will place a file into SD:/titles.csv once it's done

press to exit

once SD:/titles.csv is dumped

transfer titles.csv into the same folder as NX-GIC

open nx-gic File > Settings and put the csv location into Installed Titles List (CSV)

1.4.0 Bug

CLOSE nx-gic after clicking save then re-open it

Click SCAN and if everything was done correctly you should now see all the icons.

Now you can work offline if you wish to transfer icons it's worth checking the other guide

adding your own icons can easily be done keeping the file name structure:

mariokart-8-deluxe-icon001-[0100152000022000]
GAME-NAME-iconXXX-[titleID]-(Optional-username)

vertical icons start out at 600px x 900px (2:3 ratio) and must to resized to 256px x 256px save as jpg non-progressive and keep the filesize under 120kb otherwise they may not load