I have installed Windows 10 and I need Lumix Simple Viewer. My camera is DMC-fx30.
The software comes bundled with your device on a CD or on the internal memory of the camera. The problem is that the software doesn't appear to be available for downloading from any of the websites listed. It's a known thing that Panasonic software is not available for public if you lost the CD with the software and even if you contact them, I doubt that they'll just provide it.
You can access support through the following link: http://www.panasonic.com/global/support/faq.html