Installing to different folder

I installed the NIS 2009 Trial and liked it and purchased a registration key, which it accepted. However, when I initially installed the Trial version, it didn't let me choose an alternative folder for my installation. If I download a nontrial version, will that let me uninstall the current installation and let me choose a different folder for installation? I like to install apps on a different drive than my OS lives.

 

Also, assuming the answer to the above question is NO, is there any reason to download a nontrial version now, or does my trial version have everything the nontrial version has, given that it accepted my registration key.