Well, she'll understand that outside is better once that is what you teach her. Presumably you trained her to use the paper... so if it's still there, she's going to keep on using it. Why would she stop?
You can't really say 'no' if she uses the paper and expect her to learn quickly. That would be pretty confusing for her, so would take some time for her to re-learn that now it's not OK to potty there.
No, the best thing for you to do is get rid of the paper and start some serious potty training. In addition to praising her extravagantly when she potties outdoors, that actually means that you've got to have your eye on her all the time and to take her out frequently so that you don't have any accidents indoors. Up until now, pottying indoors has been an OK thing to do (albeit on the paper) so don't be surprised if your pup doesn't 'get it' right away. Vigilence is the key to success here.
When you can't be watching your pup, then she should be in her crate - unless you're *very* sure she isn't going to need to go. Keep taking her out regularly, praise madly when she potties, and eliminate any opportunity for her to get it wrong and potty indoors. Keep that up for two or three months, and you should have a reliably housetrained pup. Good luck
