If I have a key for Vegas Pro 11.0 and I install a newer build or even Sony Vegas Pro 12 after formatting, will it still work on a different name (I lost the password/email to the last one)?
No because it's registered under that email and that name. So the only way to get that email or change it is by calling Sony and telling them you have lost that email address and can they change it.
If you just brought it second hand then the seller would need to contact sony and ask them to charge it in your name
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Verified answer
Simple answer: a valid serial for Sony Vegas Pro 11 will NOT work for a valid Sony Vegas Pro 12 installation.
No because it's registered under that email and that name. So the only way to get that email or change it is by calling Sony and telling them you have lost that email address and can they change it.
If you just brought it second hand then the seller would need to contact sony and ask them to charge it in your name