Yes, VPSKey works in Windows 10. I've installed it and it allows you to type in the supported language. While installing in Windows, make sure to use Run as Administrator because it needs to copy various files to the system partition, and by launching the setup as Administrator you are giving permission to do so. This prevents you from further errors or compatibility problems.
In fact, you should do this for all the applications installed on Windows 10. The VPSKey application is available for download from the Wikipedia page set up for this.