The FreeCAM does NOT support autoupdate.
Only Plainkeys are processed by the FreeCAM (that site you referred to calls them "Op keys"). The reason the PMK has no key index number (02, 04, etc.) is that it is not indexed. There is only one PMK but a whole table of PKs (although usually only one at a time is used).
Now you may wonder why some keys are displayed as "hidden" if you use the unedited version of firmware that went round originally. The hidden attribute arises from using a "provider id" value of 80 or 88 as I recall. Some people thought this hinted at interesting things like masterkeys and autoupdate. Nothing of the sort. This was incorporated because the original idea was to market the FreeCAM pre-loaded with keys which would not be visible to the user. But given that plainkeys are so widely avasilable and that the firmware and programming utilities were leaked anyway into the public domain (again, not the original intention), it all became pointless.
There then followed a rash of reports of a "Magic CAM" supposedly supporting AU. I personally analysed those firmwares and found them to be functionally identical to the non-AU freeCAMs. In other words, someone was just releasing FAKE files for a laugh. You can find all of this info on old posts on this board (I also posted it at the time under Satnerds).
On the unchanging keys:
The provider C+NL transmits under Irdeto (as well as Mediaguard) and has been using the same Irdeto plainkeys for three years. The provider Premiere World (Germany) used the same keys for about 2 years before recently changing them.
So the policy of managing keys is not universally one of frequent updates.
This incidentally has been a source of puzzlement in the respective countries. While C+NL even today still has not changed any plainkeys (the cheapest and easiest of measures to combat piracy, and something that some providers do hourly), they do whine and bleat ad nauseum about the harm piracy has done to their business, aggressively forcing shut any web sites that dare to publish those unchanged keys. It's like continually leaving your car unlocked and still expecting sympathy when it's nicked every night. Worse, it's like refusing to spend a few pounds on a lock but spending millions on a high-tech surveillance system to deter burglars.
2old