How do I install on a second computer?

[Garry A. Leslie]

Hello MTU,
Just upgraded today, to 4103.
Apparently the new registration is not tied to the Ethernet card as was 4008
I signed the acceptance which states "licenced for 1 computer".
I would like to install on a second computer not only as a backup, but also because with 4008, after importing and editing lyrics, adding the music, just as I punch the last word of lyrics to fit the tune, I get a crash.
Spend all day yesterday and most of today with the same result every time.
So although I am registered for 1 computer the programme is not working.
Have tried all the advice for uninstalling but as it used to work and I haven't added anything new seems like I will have to use one of my other computers.
Advice please
Regards from across the pond
Garry