Go to your HDD-> Library>Receipts & find the file called
install limewire.pkg & trash it. Then try again. See sample image here
Receipts folder sample image
BTW if you're backtracking down to 4.8.1 version, I'd recommend you delete your LW prefs folder. Otherwise LW 4.8.1 will attempt to behave in odd ways it wasn't designed for. LW prefs folder is found here /Users/your_username/Library/Preferences/LimeWire
The LW Prefs folder should be deleted "BEFORE" you open up LW!
But if you're using LW 4.9.x then hopefully you should be fine!