CSV Import killed my website!

Hi, I used CSV Import to upload my listings and as soon as I had, I got redirected from my DP dashboard to the standard “Welcome to the famous five minute WordPress installation process!” – in other words, I got redirected back to /wp-admin/install.php and I can’t access my site or dashboard anymore. Help!

Note #1: I made successful test uploads many times while testing (max 5 records), hoping to create the right database keys and data to suit the needs of DP, but then I accidentally uploaded a CSV file that may not have suited my DP install (all I did was add 2 new database keys which were not reflected in the CSV upload). Granted, this is the first time I tried uploading my master file of 350 records and there could have been other errors in the file?

But seriously, how would this have broken my website?? Help!