It does... at least, as long as you understand that the configuration file is a non-functional sample (since some sites, including this one, are prudish about linking to a list of titlekeys)
But, simply uninstall pgki (like any other app: from Content Manager or by pressing triangle on the bubbles screen), delete the contents of the ux0
kgi folder (using vitashell directly, USB mass storage, or FTP), then follow the instructions you can find on said titlekey website (the same you probably used for PKGI):
View attachment 139409
Yes, there are some inconsistencies (like using the name of pkgi when it's actually pkgj) but the steps are accurate