Again, I repeat and confirm the *current* version of Couatl.exe, doesn't have ANY reference to Python25.dll anywhere.
If you are still getting that error, it means:
- You are installing an older version of GSX
OR
- Your antivirus is blocking the installation of the current version of Couatl.exe (contained in the new installer), so you are stuck with the old one, which WAS requiring Python25.dll but, it cannot find it anymore, since the NEW installer has (correctly) removed all files that were needed by the old version, and are not needed anymore by the new one.
But if the antivirus has mistakenly blocked the new one from installing, it's normal you would see such error from the old one.
It's very easy to identify a new version from the old one, since the build version of the old Couatl.exe (the one that required Python25.dll) was 2-thousand-something, which means it's Couatl 2, and outdated version.
The current Couatl 3 has a build number of 3-thousand-something, which means it's Couatl 3, it requires Python27.dll, and it has been released as a non-Beta at the start of August 2015.
None of the installers we have online now contains Couatl 2 so, it's not possible you get it by mistake when installing any of them, provided of course you are running *them*, not an old download you might still have around.
If you are SURE you are installing a current installer you just downloaded, and you are still getting the Python25.dll error, IT'S 100% SURE IT'S THE ANTIVIRUS, which is mistakenly blocking the installation of the updated file, so you are still stuck with the old one.