The software is not working anymore because the developer ceased support and developed due to the lack of support from users. You won't be able to install the application or get additional upgrades now the software has been discontinued.
Here is the official website where you can see the developer's announcement: http://www.fx-software.co.uk/
I believe the problem with the software is lack of compatibility with the operating system. However, right click it and choose Run as Administrator or go to Properties > Compatibility. Choose a previous version of Windows from the list.