Hi, I'm new to Greenfoot and just trying to help my son. He has a project he is working on in school and wants to work on it at home over half term. We've installed the correct version on our home PC and he has tried copying the greenfoot.project file to a memory stick, uploaded a copy to Google drive and emailing a copy but when they are opened they are all empty. Am I right in thinking that he needs the whole folder and not just the single file? Does he need to use the export option? Thanks in advance.