Everything is fine, I got my digital signature and my serial number in there.
I haven't said your digital signature isn't fine *today*, and I've haven't said you haven't purchased FSX. I've said that the log indicates you HAD an hacked FSX.EXE (or maybe just one which was corrupted by a virus), from Jan 15 to Jan 18, then the errors went away, and Couatl is not generating any errors right now.
If you could manage to produce a Couatl.log file, we could have more data about this. It's just not possible the log file wouldn't appear, since Couatl IS running, and it should generate a log, provided you followed all the instructions.
Try the following:
put back
logFile=couatl.log
in the Couatl.ini file but, before launching FSX, go into the FSX root folder, right-click on it (on the FOLDER), select "Properties" then the "Security" tab, click the "Edit" button, on the next screen click "Add" and add YOUR USER NAME to the list of the permissions, with "Full Control", then choose to apply the setting to all files and subfolders of FSX folder. This will ensure you have write permission in the FSX folder to produce a log.