Bryce 5 issue

I have the full paid for version of Bryce 5. A few months ago my computer crashed, got a new one and put everything into it. Everything works fine except the import model function for bryce. It keeps telling me the end of the file is unexpected - then it says it can not find the file. These are all files with extentions I have used many times before. What do I need to do to fix this, cant find anything listed.