Rokpad is an editor. it's a non-wysiwyg editor (unlike jce or tinymce). We always recommend our editor as you won't run into issue of wysiwyg editors writing lots of inefficient code and deleting perfectly valid code. You can uninstal rokpad if you wish though. Rokpad is not hacked, though that's not to say that your particular site has not been hacked.
We would be interested to know more about why rokpad is being highlighted by your security checker.
Regards, Mark.
Please search forums before posting. Please make sure your post includes the version of the CMS you are using and a link to the problem. Annotations on screenshots can also be helpful to explain problems/goals. Please use the "secure" tab for confidential information.