cuoatl error on FSX startup

[mopperle]

Starting fsx I get this error:

couatl v3.0 (build 3185)
panic log started on Tue Oct 27 09:26:24 2015

problem raised by addon <unknown>
Traceback (most recent call last):
  File "<string>", line 47, in loadAddons
  File "<string>", line 36, in importAndCreateInstance
Couatl.DecryptionError: magic number mismatch
{}

[mopperle]

To add: this error occures permanently with these message boxes:
until I answer the last question with NO

[virtuali]

Starting fsx I get this error:

couatl v3.0 (build 3185)
panic log started on Tue Oct 27 09:26:24 2015

problem raised by addon <unknown>
Traceback (most recent call last):
  File "<string>", line 47, in loadAddons
  File "<string>", line 36, in importAndCreateInstance
Couatl.DecryptionError: magic number mismatch
{}

This error simply cannot happen, unless you have a mismatch between *very* old versions and new version, for example if you tried to "merge" some files from a pre-1.9 version into this one.

I see you don't even have the latest Couatl.exe so, it's best if you uninstall GSX, and reply YES to the question "Do you want to remove the Couatl engine ?" made at the end, and reinstall it, using ONLY the latest installer on our site. Don't try to add other files from previous versions manually, it will never work.