Upgrading from old Dell-branded version to new "Quest Software"-branded version. Do we move the install directory to be under "Quest Software" or not? (4257098)

Currently our installation location is at C:\Program Files\Dell\LiteSpeed\SQL Server. During the upgrade to version 8.6.1, the installer/upgrader states that the default install location is: C:\Program Files\Quest Software\LiteSpeed\SQL Server.

Should we change that default pre-populated "Quest Software" install directory, so that the new version instead installs into our pre-existing Dell directory?   

If we allow LiteSpeed to just install into the default "Quest Software" directory, will the installer recognize that we already have a previous installation in the previous default directory under Dell?  And so then will it do an upgrade of that version and retain all of our configuration settings?

Or, (if we allow LiteSpeed to just install into the default "Quest Software" directory), will it simply be a fresh installation and we will now have two different versions of LiteSpeed installed onto that same machine? We want to avoid this outcome. So if this is the case, we will just retain our original Dell installation directory.