You can download it using that link, but you must check the current firmware version to assure you are using the correct update. There is a problem with their instructions to do that. They should say:
Turn on the 3D camcorder Press the joystick to enter the playback menu Move the joystick down and hold for a minimum of 5 seconds Press and hold the photo-shutter button while still holding the joystick. After about 3 seconds, you'll see the status menu. Check at 4th position "FW Ver:"...
If you are reading the card with a card reader in the computer, then you just need to go up one level from where you were. The root level is the one (such as C:\ or E:\) that all the directories start in. If you click on the device (disk) under (My) Computer, you will be in the right place.
Once you see the firmware version is 3xxx, you can upgrade to the version on the website since you know it's compatible. All you are really doing is making sure you don't have a model with version 1xxx firmware, which would not be compatible.
The upgrade process worked properly until it came time to reinsert the card and start the upgrade. Then nothing happened. The two programs (one of which had no data at all) were on the card, but inserting the card and turning on the camcorder had no effect whatsoever except to start the camcorder in the 3D mode The upgrade did not happen.
That's correct that one file had no data at all, and technically its file name itself was the data. I have no idea why it would not work. It worked for me, and all I did was copy the files to the root directory of the card, put the card in the camera, turn it on, and the upgrade went as expected. The instructions say that if you leave the files on the card, the upgrade will happen each time you turn on the camera.
I'd suggest making sure that the files didn't get copied to a sub-directory (such as DCIM or the one with the videos) by mistake. You can also check the firmware version again just to see if it changed.