Hello

i try to explain it again (sorry about my bad english, i'm from germany).
1. step: delete the whole limewire ( means all LW versions), favourable by using the uninstaller
2.step : install the 2.6.5 limewire, start it one time and set your preferences, then quit it and delete the limewire folder by drag and drop
(nothing furthermore is here necessary, because your preferences are saved in another folder)
3. step: install the 2.7.3 limewire, it uses your setted preferences, everything should be right

I tried this way again and it works.
If this doesn't help, probably it would be better to use the 2.6.5 version until the bug is fixed by limewire.

Here you find the whole download archive of limewire:
http://www3.limewire.com/download/

Auf Wiedersehen, bis nächstes Mal.