I just got a used P12 and it has firmware V2.06. I downloaded V2.11 and when I unzipped it, I got the following warning.
There are some data after the end of the payload data.
This makes me wonder if something in the zip file is corrupt, so I don’t want to do the upgrade until I can confirm that everything is OK.
Here is a screen shot from 7Zip showing the CRC values for each file.
Also, there are no release notes, and I don’t see any previous versions under the Product Update Archives, so nothing to fall back on if the V2.11 update fails.