Gravity Forms Corrupted - Not Working After Multiple Installs

I have had a hellacious problem with my Wordpress being hacked many times.. and I have installed WP from scratch. I can't seem to get GF working. I worked great the first few times... but even after I have do the "uninstall" procedures from the GF Wordpress menu... wiped it off the http://FTP.. uploaded a clean fresh version of 1.5.8.2 (or whatever is the newsest).. the form won't edit properly and it gives me gabbles of code output about the top headline of the Form Editor. Here is an example.

","subject":"New submission from {form_title}","message":"{all_fields}"}};

Sometimes it will spit out several lines of code fragments.. but never a proper PHP error.

I suspect there is some kind of lingering metadata or some kind of issue that won't let it start fresh. I am running the newest version of WP and PHP 5. What can I do?

Please help?

I want to assure you that I wasn't hacked, just comment spammed to death. The databases was backed up and re-importeted... I cannot delete 4 years worth of posts and comments. The new Wordpress is perfect and all permissions and security are pixel perfect. I have new security software installed. All posts, comments and plugins and software work flawlessly except Gravity Forms. Whenever I delete GF... it seems to "remember" some metadata from previous form install attempts... and generate funny results. No one can contact me. What can I do to get it up and running fresh?