To uninstall postgres:

1.Open the control panel -> add/remove programs and choose postgresql.

2. To install postgresql: download release 8.4 from PostgreSQL: The world's most advanced open source database and follow the installation steps.

If you can't figure it out Please schedule a remote support session with our support. Email support@holdemmanager.net, with a link to this thread and your forum name, so we can setup a Teamviewer session.