Apple has not yet provided a way for developers to transfer existing licences to the Mac App Store. Our intention, for now, is to continue publishing TypeIt4Me both directly via our website and via the Mac App Store.
The only difference between the two versions is that one handles registrations and updates via Sparkle, while Apple handles those things for us in the Mac App Store version.
The version 5.0.5(30) update became available through our website six days before appearing on the Mac App Store.