Hi everyone, brand new to the TomTom...I picked this up from a co worker. Didn't have maps etc, so I purchased and downloaded after some reading. Then I got the flashing X...more reading downloaded and copied the files. Got past the X but in the meantime I realized the files I copied were for the XXL 540! Turned on the unit and I have no access to the main menu...says: "Main Menu 1 of 0". Figured if I could get the files for the original software I should be able to reload the 550. Anyone know where I might find the file?