Well the way I know of is time consuming. You select one account and look at the number (a program in the FL EXE folder tells you the account number) then write down all the numbers of your accounts and install FL on your new computer. IF you have 3 accounts you'll need to install it on 3 different computer user accounts. Each time open up multiplayer and put in one of your accounts. After each time start up FAM and have it add the account.