is there a difference between limewire 4.9.11 from www.limewire.com and the product: limewire 2005 software?

And is there a difference in downloading from here and the limewire from places such as www.download.com/www.cnet.com, and www.download-it-free.com or something like that?

And what does the PRO membership mean about the 6 months thing? Is it that I can only use it for 6 month?

Is there really a big difference between the PRO and the BASIC?

thank you!!!!!!!!!!!