Also, if this is a desktop application built for an earlier version of Windows, it probably assumes that Flash Player is installed in a location where it doesn't exist. Flash Player is a built-in component of Internet Explorer and Edge on Chrome. An older desktop application would be looking for a separate, independent Flash Player product installed on the machine, but IE and Edge no longer allow for that, and the application itself is making a faulty assumption in the context of the modern operating system.
If that's the case, you'll need to go talk to DreamBox about how to work around the issue on Windows 10. If the product is still around and maintained, they probably have a Win10-specific version that eliminates this dependency.