Might be a good idea to have an option to load the current key value from the Registry.

[DrewNaylor]

This would make it easier to modify the current page visibility settings.

[DrewNaylor]

Copied this from #1's description since it's still a good idea.

[DrewNaylor]

The menu item entry would probably say, "Import selections from Registry", and the one for importing from a file would be renamed to, "Import selections from file...". The export to file option would also be renamed to, "Export selections to file...".