What relation between the old version names and new (versions 3.0 – 4.0)

The update 4.0 of Booking Calendar have a new names of the versions.
The Booking Calendar Standard become Booking Calendar Free,
Booking Calendar Professional -> Booking Calendar Personal,
Booking Calendar Premium -> Booking Calendar Business Small,
Booking Calendar Premium Plus -> Booking Calendar Business Medium,
Booking Calendar Hotel Edition -> Booking Calendar Business Large,
Booking Calendar MultiUser -> Booking Calendar MultiUser.