All changed data is gone when I quit and return

[Aperson]

There is a save changes button, the only I could find anywhere, in the team config page.

But the game didn't save. I came back to a brand new start, as if I'd done nothing when logged in before.

[Colly]

Top left corner. A series of lines denote a menu... click that.

You'll see a drop-down menu of options click save game to save your game (you can also type in a new save name if desired). The default is to save as the name of the league you set up.

Also, use this same drop-down menu to exit to the main menu then exit the game.

[Aperson]

Yep, it's there. Thanks. I guess I'm really not used to an important menu being in the upper left corner, not really marked to show it was the most important menu to find, But I found it, so I should be good.