Every FSDT installer always installed 1.3.3, we never distributed any other version. It's not possible you would still get the 1.3.1 if using one of our installers.
If you still have it, that's even more indication that something very wrong is happening in your system. Of course, the antivirus might has well block anything coming from our installers, so it might have blocked SODE too...
Try to download and install it manually.