FEX Viewer™ Download FEX Viewer (Free) FEX Viewer - v188.8.131.528 - 17 Apr 2021 Setup Instructions: Download the setup executable and follow the on-screen installation instructions. FEX Viewer is free software and does not require activation. Product Details Change Log Change Log FEX Viewer Change Log FEX Viewer is update with each FEX release. Please see the main FEX change log. 1 September 2020 Released.