Another thing to get right is 8DIO updates themselves start with number 00 (last prophet), 01, 02 etc while the purchased slots in my PX start with 01, 02 and so on. Not speaking of every 1st sample place being empty in every instrument group (but this is normal behaviour).
I've installed Jupiter 4 update in my next free purchase slot number 6 and it showed size 0 MB after installation, whereas it should be over 1GB. All other add on libraries (1-5) show their correct corresponding sizes. The install process seemed flawless, and when I go to group section I see add on 1-6 can be selected. To make sure everything is right before I'll add the Moog Prodigy library to purchased place 7 I erased the JP4 add on and installed it again, but it keeps saying size is 0MB. Is this also a common issue of the PX's bad size guessing?