Make a copy of your .lg folder and put it somewhere.
Do this often.
Make backups often, make backups often, make backups often.
Anytime you want to go back and start from any point you made a backup, you can just move that folder back into the saved games folder. Rename it anything you like.
Did I mention - make backups often, make backups often, make backups often.
Good luck, enjoy your league.
