If you still want the Pro version you'll have to buy it again. Pro is good for 6 months of free updates, during which you can d/l it as much as you want. After that you have to buy it again. That's why it's a good idea to make a copy of it on a disc incase for some reason you lose the program(virus, crash, hdd catches fire
, ect).
If you don't want to pay again you can always d/l the Basic version, Which in my opinion is just as good as the Pro. Either way, make sure you get it from the official site:
Lime Wire » Download LimeWire.
Good luck and let us know if you have any problems
.