classified plugin - I broke it! Help!

Hello,

We are currently running a buddypress website - utilizing the classifieds plugin.

You can view website at: itsinourblood.com

we had the classified plugin installed and it was working, but I was tweaking the settings because I wanted different input fields for different categories.

For example: we wouldn't need a salary input box if we are putting up a tool for sale.

So question is: is that possible?

and second part is - I need help fixing the damage I have done...

Great plugin by the way