Yes, it is installed on my C:, as I mentioned in an earlier post. I now have
the 4.2.3 on all three drives. I had the 4.12.14 downloaded and installed
on an external drive, but when it didn't do any better, even somewhat
worse, I removed it and stayed with 4.2.3. I always keep the downloaded
setups so that I can reinstall if needed.

I have checked all the drives for the Prefs file, but it is totally non-existent
on any of the drives in either the old Limewire version, or the new. It took
me a good while to actually look at every file, and folder, double check to
insure that hidden files are shown, and then also use the 'Find' program in
the Windows Explorer. I checked, but I always have my settings to show
the hidden files. I checked that all before I ever made my original post in
this forum. Still, Nada. (Just try to imagine checking every
folder, and every file on each of three, separate hard drives with the total
files being 120406, and folders being 9630. It took me a bit of looking to
be sure that no such file existed. That was also backed up with the lack
of such a file or folder found with the 'Find' method.)
Even with the first ever installation of Limewire on this PC, it didn't work,
or have any Prefs folder/file, or anything similar. My old program always
did work before I switched to cable. I switched after I built this PC with
what I wanted, but before any installation, or use of Limewire. I still have
two other PC's with Limewire installed that I used with dialup. I no longer
have dialup service. Our only choices where I live are either dialup, or
Insight cable. Wireless is useless here due to poor location (radio wave
propagation lousy), and with such poor phone lines there is no DSL.
Both services are underground with the phone lines being 50+ years old.