Here's how I did it. If you're very lucky, you installe the preview, recompile, and everything works. But more likely, you'll have to address some of the specific issues in the post I linked.
You should not have to create a new project and move everything over. But if installing the preview and recompiling doesn't "just work," and the issue you are encountering is not discussed in the post I linked above, then it is sometimes worthwhile to create a new project for the sake of comparison. Figure out what part of your own project doesn't work, and compare it to what you see in the "empty" project.