It is tricky to re-program this model after a full RAM clear, so I wouldn't advise doing it unless you have to. It is better to edit the existing programming to suit your needs.
If you need an operating and programming manual,
c-tech has it here:
http://the-checkout-tech.com/manuals/cashregisters/TEC_MA-1450_owners_programming_manual.html
Registerman, September 2010