Thank you for getting back to me. I'm fairly certain the log-in details I am using are correct but as I changed them earlier in the day and only logged in once since perhaps there was a glitch. Anyway to check I followed the link you provided but unfortunately there is no generator/config.inc.php. There are two php files generator/index.php and generator/runcrawl.php but neither have the log-in info. There are also two folders, a data folder and a pages folder. The latter contained a folder page-config.inc.php but that didn't have the info either.
The version I have is "Standalone Sitemap Generator (PHP) v3.0, 2009-05-19" and I was wondering if there is some other folder I should be looking at.