I've installed 1.5.0 via Hostgator's QuickInstall. The install was painless, as was the application of the theme I'm using. Ran into problems when I did the database import. The database is a database I put together on a 1.3.9 site that I had.

I'm getting a message on the Admin login screen that says:
database upgrade required. please run the 1.3.9-to-1.5.0 upgrade via zc_install

On the website itself there is a red bar up top that says:
Your database appears to need patching to a higher level. See Admin->Tools->Server Information to review patch levels.

The problem I'm having is that I can't access the Admin section AND there isn't a zc_install file on the server because I used the host's QuickInstall feature.

Need some help. What's my next move here? Do I download 1.5 and try to use the install folder or do I delete what I have, manual install 1.3.9, then apply database and finally upgrade to 1.5 and then apply theme?