i have a blog based on WP. first i had installed wp v.2.9.1 and every thing was right. after coming v.2.9.2 i had upgrade my wp directly from my back office and haven't backed up my database. after upgrading my theme have some problems and don't truly shown. i have tested many ways and finally find that it refers to WP version. now i want to downgrade my wp to previous version and want to keep all settings of my plugins (i have some plugins like polls and cystate...) if i want to downgrade i must delete my database and install a fresh copy of wp?
if yes, what can i do for my plugins to maintain with their settings?