Best way to continue forward is to create a new bare-board project in CW v10.x. The project importer tries to do a good job, but as you've probably found out, it isn't perfect, and sometimes you have to spend some time tweaking things to get the imported project to build properly under CW v10. If you're going to do that, you might as well make a clean break and spend the effort on a project that doesn't have any legacy baggage to deal with.
---Tom