Looking at your first log, this line seems to indicate the problem:
Airport cache not valid: got error CreateFile failed: The process cannot access the file because it is being used by another process: "C:\ProgramData\Virtuali/Couatl/fsx\files.bin" (system:32), accessing "C:\ProgramData\Virtuali/Couatl/fsx\files.bin"
The other process might be:
- A Couatl.exe file stuck from a previous session
OR
- The folder itself being blocked by the antivirus.
Try a Windows Reboot and run the FSDT Live Update again, which will clear the cache and will try to create a new one on the next sim startup.