You posted your Couatl.LOG file, but I've asked to post your Couatl.ERR file instead. However, from your Couatl.LOG file, I can already see a problem, that you are not using the current version of the Couatl.exe file ( Build 2358 is old ), but it's not possible to get an old version by mistake, since if you reinstalled, the GSX installer should have downloaded the current version online automatically.
Perhaps your antivirus has blocked the download, so you are stuck with the old version. In this case, turn the antivirus off while downloading and installing.
If you are still getting the error after you reinstall ( be sure your FSX\fsdreamteam\Couatl\Couatl.exe file is build 2364, which is the current one as of today ), then please post your Couatl.ERR file.