A boneheaded move with install directory

I got a wordpress install up and running, but then I went in and changed the install directory within options and now it says that there doesn’t appear to be a WP install and suggests I run install.php (doing so says the databases are already there and to wipe them to do a reinstall).

I’ve checked the database settings in wp-config.php and they seem fine. Where would I go to set the install directory again?

I installed WordPress from within Netfirm’s control panel (which gave me the option of setting it as the default site) However, the install went into https://www.URL.com/SITENAME/nfblog (which I didn’t want).

I wouldn’t mind reinstalling, but I want to recover some posts I’ve made before doing so. Suggestions?