Thanks for the quick answer. I did go there and downloaded the program again. i did installed but after i enter the SN is asking me for the authentication numbers
@Angela-Gomez-Hodgson this may apply: "Older versions of Vegas Pro than 14.0 are licensed under a system (as previously used by Sony) which permits use on multiple computers by one user; after an unspecified number of installations on different or updated PCs you may need to contact support to reset your "installation count"."
For support try Live Chat (or other options mentioned here).