If you can’t get the old files to work, check out on Steam. It’s the spiritual successor to the 3Planesoft era, offering thousands of 3D, interactive backgrounds that are easy on your hardware.
If you have already downloaded and run a "PATCHED All 3Planesoft" pack, assume you are compromised. Perform these steps immediately: PATCHED All 3Planesoft 3D Screensavers