thats why alf as i siad in another post, before you do anything you must syncronise all members clocks,this puts all details from the pc onto the clocks, then when you put on the new update it clears everything from your pc, (the old management,) by syncronising all clocks before you put all info on them, so once you download ur new management, which has not got the info from ur old u syncronise your clocks onto the new which will download all the info onto it, you must syncronise all clocks before you do anything with the new disc to put all info onto the members clocks, then syncronise them onto the new system which will put all the details back on it,
PS. by syncronising a members clock, you put all info on the clock onto the pc, and all info from the pc onto the clock.