I tried to update via Live update a dozen times : it always detects exactly 370 tasks to do, and downloads the same files each time... Very strange.
This is neither strange or wrong. That's just the number of *possible* tasks to be checked, but it doesn't mean all of them require an update. The actual check for outdated files will be done while the tasks are being performed.
You did not read my last post : WD cannot block your files, because I excluded the whole addon manager folder, as instructed. And my firewall is disabled.
I obviously read it, but I cannot possibly be sure you did everything correctly.
And it wouldn't be the first time an antivirus blocks files even when the folder is excluded from scanning, I witnessed this personally on a user system doing a remote assistance section, the antivirus was so bugged that, even if the file were excluded from scanning, the antivirus own Window service was still blocking them in the background, because they were flagged as threats *before* the user create the exclusion list. It was a bug, of course.
And, I cannot possibly exclude the chance you have *another* security software which is acting like a firewall or antivirus which is still blocking the download, like an anti-spyware, anti-adware, or something like that.
Plain Windows Defender doesn't have any problems with our files.
Before you ask, my VC++ files are up to date (uninstalled all versions and reinstalled using the proper links), and my Simconnect is alive and well.
While you can say if they have been installed, you cannot be sure they are installed correctly and not corrupted of conflicting by themselves, which happens sometimes.
I just tell you that your live update manager does not seem to do its job : it keeps downloading the same files again and again
That's not what it does, of course. If you already have the latest version of a file, it will NOT be downloaded again. If it does, it simply means you DO NOT have the latest version of the file. And the only possible reason why the updater cannot get the latest version of the file, is either the antivirus OR the firewall are blocking the download, so you are stuck with the old version and, each time you run the updated again, it will try to download it again, failing because that software interfering with it.
GSX keeps crashing as soon as I launch P3D4.5. It never happened before.
If with "crashing", you mean the error report about the magic number you reported before, it's not really a crash. It's an indication that you have an OUTDATED version of some files which are required for it to run properly. There are no other reasons why this message could possibly come out.
If the updater keeps downloading stuff, it's a clear indication something is blocking the download. Normally, you shouldn't see *any* files being downloaded, if you run the Updater twice in a row, for example.
So, obviously, something is wrong with this specific version of the software, OR with my system. Or a combination of the two, as you say.
Since there isn't anything wrong with this version of the software, otherwise we would be flooded by *thousands* of similar reports, the only explanation left, is that something wrong in your system, otherwise it would happen to everybody, not just you and a couple of other users.