I bought movie studio 14 in the beginning because I thought it was Sony Vegas Pro 15 so I. By Sony Vegas Pro and now I have Sony movie studio for no reason . What should I do?
If it's never been installed and never been used, you can re-sell it. Or, if you've only recently bought it, you can see if the vendor you bought it from will give you a refund.
If you bought it from www.vegascreativesoftware.com, see this comment regarding the refund.
Btw., where did you get a Sony Movie Studio 14? As far as I know, there are only the (Magix) Vegas Movie Studio and (Magix) Vegas Pro product lines available of versions 14 and 15. See the Vegas product pages (choose your area) for more info.