I tried to install PC/System2 on Windows 10 and the message is: "App Can't Run On Your PC." So how can you have both versions installed on your computer to do the Import and Export. I tried to export a file I created in PC/System2 and I received a message from Personal Composer 3 demo that "This is not a Personal Composer File." I tried changing the extensions of the file to .pc and received the same message. Any ideas or work arounds? I sure would like to be able to view all my old PC/System2 files that I created. Thanks!