I'm having troubles saving files with Mathcad 14. I have v14 installed on my computer, and my colleague has v13. When I save a file as v13 *.xmcd, my colleagues Mathcad says that the file has been created with a newer version and cannot be opened. This problem doesn't appear when saving as v12 document, it can be opened normally with v13. Is this a bug in the program, something wrong with the lisences or don't I just get it?