I followed that link in virtuali's post and did #1 and #2, repeatedly. My Real-time-protection is off all the time. Did the VCredist uninstall/install stuff. Didn't touch the Simconnect stuff so far, as it works flawlessly with other addons, SPAD.next for example. I can absolutely rule out #4
Note that this is a totally fresh setup. This computer was assembled my me last weekend, with a clean, activated and updated Win 10 Pro installation, Prepar3D_v4_Academic_4.3.29.25520 was setup and now I am adding scenery. For the record, yes, P3D worked so far, did first flights already. Now I am trying to add FSDT addons today. At first I had only JFKv2 installed. Fired up the sim. Ran just fine, Couatl and activation process were good, so I did some orbits across JFK and NYC (enjoying my new hardware above heavyweight scenery...).
Then I installed GSX and LAX. Started up P3D again, start location LAX active runway. This was the time when Couatl started to deny service, with the aforementioned message.
After checking the linked thread
http://www.fsdreamteam.com/forum/index.php/topic,8428.msg68872.html#msg68872, I worked my way through #1 and #2, multiple times, right after switching the Win10 Real-time-protection off. In between I checked even "manually" on the disk, verifying everything, including AddonManager folder was wiped off.
Did reinstall GSX from a fresh downloaded installer once, same problem. Did uninstall. Reinstall second time, same problem.
Same for the Visual C++ 2005 runtimes, did this twice. No chance.
Did I forgot to say I am in admin role and also manually launched everything with admin rights?
Problem persists. Sad.
If you insist me to try that simconnect wipe, please advise how to "repair" it back, since unlike in the #3 description, I don't use FSX.
What I also found a bit confusing was the wording
- DOWNLOAD AND INSTALL with the antivirus entirely OFF
- Uninstall GSX. Reply YES when asked if you want to remove the Addon Manager and the Couatl Engine. Reply YES to both questions.
- TURN OFF your antivirus.
Since according to the first hyphen I have antivirus entirely OFF, I can't really turn it off any further as demanded after hyphen #3...
Any help leading to a solution would be appreciated.