There is no compatibility information regarding Freehand 9. However, if it's working in Windows 7, then it should work in Windows 8.1 as well. It's not a general rule, but most of the Windows 7 applications that don't have any drivers bundled are working just fine. Just make sure to run the installation as Administrator in order to give the application exclusive access to the system partition, registry (very important!!!), and file access.