It would be helpful if we can use our code from beta 3 in the upcoming beta instead of having to start all over again from the templates. Is that possible?
When the next update to Rocket is released, you should be able to simply open your old projects and code files. The editor works very differently than UE3, so the code and projects will still be viable in every version. I hope that this has helped to answer your question.
If you have any trouble you should be able to run generateproject bat file to generate more up-to-date files.