vegas video plug-in pack v1.0.139

I have vv3 v3.0c installed in my system for quite sometime now. Now I downloaded their plug-in pack, demo version which I have the serial of course and when I installed it, it didn't asked me for the s/n. And when I tried to use this plug-in, the logo is there. How do I install it to make it a full version so that there won't be any logo anymore? Thnx.
 
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