If you recently purchased it, then you should be able to log into your Personal Pro download page from your PC with the email you used to purchase it with from here:
http://sales.limewire.com/support/pro_lookup.php
If your past the 6 months free updates period you'll have to copy the installer from your laptop and install it onto your PC, or you can d/l the basic version for free or you can purchase it again. I think I touched all the bases. Hope this helps
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