<<I'm playing in a league that uses Diamond Mind Baseball. If some managers in our league upgrade to version 9, and some stay with the older version, can we still exchange statistics?
No, it is not possible to transfer stats, rosters and manager profiles between different versions of the game. That means your league needs to decide whether to stay with the older version or have all league members upgrade to version 9 before your next season starts. Your league can convert in mid-season if every league member converts to version 9 at the same time. >>
There should be no problem staying with version 9, other than not being able to take advantage of whatever upgrades 10.0 has. Particularly if the new Computer Manager works much better.