I have been using Magick to convert my image files from png to ico. If you create an image set of pngs (16.png, 20.png, 24.png, 32.png, 40.png, 48.png, .64.png, 256.png) you can feed that into the Magick CLI using magick convert 16.png 20.png 24.png 32.png 40.png 48.png .64.png 256.png -colors...
I created a folder icon for my own personal use with the Adobe CC libraries. To add it, you just need to go to `C:\Program Files (x86)\Adobe\Adobe Sync\CoreSync\sibres\CloudSync` and replace the current icon files with the new ones. Then, restart Windows Explorer (task manager > explorer.exe >...