Your incomplete's won't be affected but ...... what version of LW do you have? If your version is earlier than about 4.4 then you may need to use the add/remove control panel to remove LW before you reinstall. Otherwise the installer will remove the previous version of LW at the beginning of the installation process. Sometimes it's advised to delete the LW prefs folder before you update to pro. If you have any odd behaviour then do such. Try deleting your LW Preferences folder whilst LW is closed; instructions here: Point #2 & 3 in Fixes for Limewire (sample image included at bottom of page.)