As mentioned previously, the screen "Generation Seasons" is available at the bottom a box where you can copy the files from one to another football season, so without the need to re-enter the league and its teams. It will, after the copy, simply manually update the list of teams by eliminating those that are no longer part of the season or for another reason why relegated and introduce the new teams that are part of it instead, because for example, promoted from lower leagues.
To proceed with the copy of the files must first create the new season (ex. 2011-2012), but can only be generated starting from the start of the season (in our case 2011) and not before. At this point in the window "From season," select the previous season (in our case 2010-2011) and in the window "To season", select the season created (in our case 2011-2012).
Press the "Copy", and the transfer will be done.