Take the time to compare their three different versions:
https://mstech-co.com/compare-folder-icon-versions/
SoS is offering the Basic version. When you click on the link, above, they are offering their expensive $55 Pro version for $9.99 for a limited time. Th Pro version has a lot more features and options.
What I need to know is this: WildWeasel suggests “FolderMagic”, yet it is unknown if either FolderMagic or MSTech Folder Icon produces changed folders that are independent of the program and portable. That feature will be the deal changer for me.