Your problem indicates you don't have the current version because, the error is referring to a line of code that has been moved BECAUSE we fixed this a while ago, so you are not running the fixed code.
Now, it's not normally possible to install and get an old version by mistake, since the installer runs the updater automatically at the end to get the latest files so, the only possible reason for this, is the firewall/antivirus is blocking the updater, so you can't get the latest files.
- Add the whole Addon Manager to the antivirus Exceptions
- Turn off the firewall
- Run the FSDT Live Update again after you have done both changes.