Is it possible to add a config option which modpack authors can update

The purpose of this option would be something like

Modpack Version: STRING

Where if the string changes the players choice runs again, that way when a modpack author updates their pack and wants players who are updating the pack to encounter the first load screen again they can.

It would also be nice if there was some way for the players choice to remember the previous selections a player made (assuming the same selections still exist)

This would be useful for modpack authors when they are shipping major updates or adding mods. Or other things change which might increase/decrease system requirements for a pack (and thus affect which mods a player might want enabled/disabled)