I am having the same problem.
I have created a team to put into the conference north.
Now I have edited game to move all relegated teams and promoted teams so league numbers are all correct, I have also dropped a team from conference north so that my team can go in.
Everything on the editing side is fine, database is still there even after restart.
Yet I am unable to start a new game with my new team, I have already checked for Data Save File, and it is set as default.
PLEASE SOMEONE HELP, IM AM DYING TO START WITH MY NEW TEAM!