...errrrr... Not exactly a clear question !
If you are asking if you can DELETE LW Pro and then RE-INSTALL it WITHOUT having to pay again, than I think the answer is yes... Don't worry as long as your LW Pro is Within the period of Validity...
Anyway, someone will come along soon and give you an 'Official' answer...
btw, can you not somehow simply make a copy to a disk of your LimeWire Pro install file(s) ?
Now, all I have to do is try to figure out what to use when renaming this thread so that it actually might mean something close to what you want !!!