@Bobun: Thanks for detailed information! I think we can safely assume at this point that ReShade isn't causing any of the current issues. The log confirms that your driver is working and that it supports OpenGL 4.5. I've compared the two Knossos releases and the only significant difference that could cause the problem is a packaging issue in 0.8.3 which caused Qt to be unable to use Windows' "Vista style". It's weird. I really doubt that this causing your problem. Hm... I'll see if I can come up with any potential solutions.
Hi guys and NGLD, i was waiting for your return and potential solution for the 2 problems i posted in my posts before, but as i didn't have any answer yet, i did other tests this weekend and finally solved one of my issue. I want to share with you guys what i did as a "return of experience" so that you will be able to enhance Knossos. I've noticed bugs with fs2_open_3_8_0_x64_AVX, fs2_open_3_8_0_x64_SSE2 and with Knossos.
It was so frustrated to not be able to play with the new Mediavps that i decided to check why it didn't work. So i I did a complete uninstallation (without forgetting files like "knossos" in Appdata\local and roaming plus "fsoinstaller.properties" in User\Name) of everything (mods, FSO, knossos, game,...) in order to eliminate side causes and to focus only on root causes.
Then i installed everything back (game+FSO+Mediavps 3.8.0 & 3.8.1) from Knossos 0.8.3
I launched the game from Mediavps 3.8.1 using FSO 3.8.0-3 (which was fs2_open_3_8_0_x64_AVX). I tried also the last nightlies Results: both the same i cannot see any ships in the techroom.
After this, i thought that "okay, accept that you will probably never play with the new Mediavps, so let's play a mod that don't need those!"
So i installed the last version of Blue Planet mod.
I launched the game using FSO 3.8.0-3 (which was fs2_open_3_8_0_x64_AVX).
Results: intro video play as normal but 1st ingame video play very slow like 1 image per second and same during mission.
It was very odd since i haven't had this problem before. I was always be able to play this mod in the past without any problems at all.

From here i was very angry not understanding where the problem could be from (and don't tell me it's my computer, cause it's not! been checked in posts before).
I tried one last thing: installing the new MediaVP from the old way with openinstaller.jar
So i did a clean uninstallation of everything, then i installed the game and used last version of openinstaller.jar. Installed wxlancher, FSO and only MediaVPS 3.8.1.
Opened wxLauncher, chose Fs2 open 3.8.0 SSe2 64bit
Played the game and got an error message (check image) "the application failed to start correctly (0xc000007b)"
Ok so it seems that there is something fishy with fs2_open_3_8_0_x64_SSE2 as both old platform and Knossos encounters problem.
Then i opened wxLauncher, chose fs2_open_3_8_0_SSE2
Played the game and IT WORKED !

At last i was able to see the new ships in techroom and to play without having slow image per second.
However, it showed me an error messages (different from the one about opengl from my previous posts). Check the image.
Unlike Knossos you have a debug button on the old platform...so after having clicked 5 times on "debug", the game launched and i was finally able to see the new MediaVPs from the techroom.
Therefore... i can safely say that there is something buggy with either FSO 64AVX and Knossos.
Something you didn't answer from my previous posts is why only Knossos 0.8.3 worked while higher version have this error message about opengl.
Maybe a track: I've noticed that (check image) Knossos launcher 0.8.3 has 48 598 Ko while new version are a bit lighter. Maybe you "deleted" something that is no longer in new versions of Knossos and that generate this openGl error. I trully think that there is a bug somewhere in Knossos. And secondly why using Knossos i'm unable to play with the new MediaVPS while using the old platform i can.
From now on i will keep the old platform, not that i like it (i sincerly prefer Knossos looking) but as Knossos new versions don't work, i don't have much choice. Please find what is the root cause to enhance our use of Knossos.

[attachment stolen by Russian hackers]