I am going to change my operating system from Windows 7 32 bit to Windows 7 64 bit. How can I keep my 4.86 accounts / ships / money / data ? How can I transfer this to 64 bit ?
Yes it does. You might be thinking of the Freelancer Mod Manager, or FLMM, which Disco no longer uses. FAM means Freelancer Account Manager, which can be found here. It's handy tool that lets you store and switch Freelancer accounts.
Alternatively, you can use the Discovery Launchpad, located here. It does the same stuff as FAM, and then some.
You can use the "export" function in either program to make a .adf file of your Freelancer account(s). Keep that file, upgrade your OS, reinstall FAM or Launchpad, and use the "import" function to add that .adf file back to your list.