Basically start from scratch. The crash may have corrupted your Java or/& LW or/& LW prefs. So, use the Add/Remove control panel to remove Java. Then reinstall the java with the offline as suggested. Then before installing LW, delete the LW prefs folder; instructions here: Point #2 & 3 in Fixes for Limewire (sample image included.)

Then reinstall LW. The installer will uninstall the previous version at the beginning of installation so that part looks after itself!

Good luck!

* OH I should warn, if your lw was running whilst your computer crashed, then your incomplete files will refuse to load. You can reload them by going to the LW Library window, select incomplete folder, select all incomplete files & press Resume button. This will force them back into the downld window. BUT ... they'll all start from zero % no matter their size or previous % downlded.