I've just updated the launcher again, I suspect with the exact same update that I already installed a couple of days ago, and still the navigation circle is way off my location when I first go into Galaxy Map. I have never had any problem with the primary star in a system not showing up on scanners, or not being automatically detected upon entering the system, as some people have reported, although it does take two or three seconds or so before it is detected. That seems normal to me.
It seems that the corrupt EDDiscovery logs I posted earlier, of 23 misreported systems thousands of light-years from my location that I supposedly visited between 8-10 October, are irrelevant and do not correspond with any actual systems that I visited, as at that time I had stopped playing due to the exploration bug, and didn't visit any systems at all. The systems I did explore prior to 8 October are all present in the log before the 23 corrupt entries and I am able to check them against the System Map in-game, as are the three systems I explored after 10 October, which appear in the log after the 23 corrupt entries.
Straight away I can see that the in-game System Map for the single system I explored on 13 October to test the bug fix agrees with my log perfectly. However the System Map for the system I started out in on 13 October does not agree with my log. According to my log the system has a star with 7 planets, 2 of them with a single moon each, and I scanned the primary star, the first 4 planets and the moon of the second planet. This is what the System Map shows:

Plainly my scan of the star is not registered on the system. Neither are my scans of planets 1-3 and the moon of 2. I've zoomed in a bit so that it's also clear that the single planet shown here is blacked out. If you click on it System Map shows that it has been scanned and is labelled as the 4th planet. But it looks screwed up.
I explored another 7 systems prior to that on 7 October, and checking the System Map against my logs I see that 2 of these systems are also missing scans, all of the System Maps are missing planets, and 3 or 4 of them have blacked-out planets.
On 6 October I explored 4 systems and the System Map agrees perfectly with my logs.
On 5 October I didn't play. But on 4 October I explored 9 systems, and apart from the system I finished up in on 4 October, the other 8 systems all show up as 'SYSTEM UNEXPLORED' on the Galaxy Map, despite my having scanned all of them.
I didn't play on 3 October either, and on 2 October only explored 2 systems, and on 1 October only explored one. But System Map exactly agrees with my logs for all three systems. I haven't checked back any further apart from one system scanned on 15 September and that was fine too.
So basically after 2 October exploration data is unreliable. I don't care about losing data between 4 and 7 October, but I would like to be sure that I'm not going to lose any more data if I carry on exploring. And what with the other bugs with the Galaxy Map that have come in with the 1.4 bomb, like the map not being centred, like planets disappearing and looking screwy on System Map, like the BACK option having disappeared from System Map, and what with FD's complete lack of explanation beyond: 'Here have an update that doesn't fix the problems, and another one, and another one...' how can anyone have any confidence in the security of the exploration data they gather? Basically 1.4 and CQC have completely ruined the game that players paid millions for. Now I'm going to shout.
ARE YOU LISTENING TO ME FD? WE'RE NOT IN DEVELOPMENT ANYMORE. UNLESS YOU START PAYING US TO DO IT WE'RE NOT HERE TO PLAYTEST AND TRACE THE BUGS IN YOUR FAULTY EXPERIMENTAL CODE FOR YOU. GIVE US OUR GAME BACK THAT WE PAID FOR ALREADY.
It seems that the corrupt EDDiscovery logs I posted earlier, of 23 misreported systems thousands of light-years from my location that I supposedly visited between 8-10 October, are irrelevant and do not correspond with any actual systems that I visited, as at that time I had stopped playing due to the exploration bug, and didn't visit any systems at all. The systems I did explore prior to 8 October are all present in the log before the 23 corrupt entries and I am able to check them against the System Map in-game, as are the three systems I explored after 10 October, which appear in the log after the 23 corrupt entries.
Straight away I can see that the in-game System Map for the single system I explored on 13 October to test the bug fix agrees with my log perfectly. However the System Map for the system I started out in on 13 October does not agree with my log. According to my log the system has a star with 7 planets, 2 of them with a single moon each, and I scanned the primary star, the first 4 planets and the moon of the second planet. This is what the System Map shows:

Plainly my scan of the star is not registered on the system. Neither are my scans of planets 1-3 and the moon of 2. I've zoomed in a bit so that it's also clear that the single planet shown here is blacked out. If you click on it System Map shows that it has been scanned and is labelled as the 4th planet. But it looks screwed up.
I explored another 7 systems prior to that on 7 October, and checking the System Map against my logs I see that 2 of these systems are also missing scans, all of the System Maps are missing planets, and 3 or 4 of them have blacked-out planets.
On 6 October I explored 4 systems and the System Map agrees perfectly with my logs.
On 5 October I didn't play. But on 4 October I explored 9 systems, and apart from the system I finished up in on 4 October, the other 8 systems all show up as 'SYSTEM UNEXPLORED' on the Galaxy Map, despite my having scanned all of them.
I didn't play on 3 October either, and on 2 October only explored 2 systems, and on 1 October only explored one. But System Map exactly agrees with my logs for all three systems. I haven't checked back any further apart from one system scanned on 15 September and that was fine too.
So basically after 2 October exploration data is unreliable. I don't care about losing data between 4 and 7 October, but I would like to be sure that I'm not going to lose any more data if I carry on exploring. And what with the other bugs with the Galaxy Map that have come in with the 1.4 bomb, like the map not being centred, like planets disappearing and looking screwy on System Map, like the BACK option having disappeared from System Map, and what with FD's complete lack of explanation beyond: 'Here have an update that doesn't fix the problems, and another one, and another one...' how can anyone have any confidence in the security of the exploration data they gather? Basically 1.4 and CQC have completely ruined the game that players paid millions for. Now I'm going to shout.
ARE YOU LISTENING TO ME FD? WE'RE NOT IN DEVELOPMENT ANYMORE. UNLESS YOU START PAYING US TO DO IT WE'RE NOT HERE TO PLAYTEST AND TRACE THE BUGS IN YOUR FAULTY EXPERIMENTAL CODE FOR YOU. GIVE US OUR GAME BACK THAT WE PAID FOR ALREADY.