Search:

You need to edit your css file to make the color changes. See these threads:
http://forums.appthemes.com/jobroller-general-discussion/job-type-colour-53311/...

If you want to search by category you can use this plugin http://marketplace.appthemes.com/plugins/job-super-search/
or there are other free search widget plugins which might help...

Seems odd. Have you read this thread http://forums.appthemes.com/fxtender-pro/plugin-keeps-randomly-deactivating-itself-50813/