Hi there, that is not how the creative cloud plugin works. It is one direction from CC to WF. Its best feature is you can create a WF proof from within your CC product without having to do it from WF. So you can create a proof with a CC file, you're just doing it from CC not WF. When you create a proof within WF, you can just select your CC file from the regular file upload option.
If this helped you, please mark correct to help others : )