For saving your clans, all you would need to do is this:
1. Take your save file out of your current games folder
2. Delete the current game and folder you have, but make sure the saves is not with them
3. When you redownload the game, open the new saves folder and insert every clan you made from the older saves into the new save folder. I reccomend doing it one by one. I also reccomend making a new clan to help you figure out where things go.
4. In every saves folder, there is a file called "clanlist". Open this file and it should have a name of your newer clans already in there. Insert the prefix of your clan names from the older saves
That should make it where you'll be able to switch to your other clans! Hope this helps