You can download the current version, sign up for a free trial, and purchase the software from the PyroSim Support Page. This page also provides instructions for installation and activation. Troubleshooting info can be found on the PyroSim FAQs page. There is no functional difference between the trial version of PyroSim and the full version, the only limitation is the trial license duration.
Administrator privileges are required to install PyroSim. This is necessary because the installer adds processes to the operating system for license management and parallel FDS simulation. The PyroSim installer will also add Windows Defender exclusions for the bundled FDS executables in order to avoid performance issues related to Windows Security. To see how to do this manually, see Windows Defender FDS Exclusions.
If an older version of PyroSim is present, the installer will automatically remove the older version during the installation process. License files and properties files (e.g., recently opened PSM files) from the older installation will be preserved and utilized by the updated version of PyroSim.
PyroSim will regularly check for and notify the user of available updates to the software when configured to do so. By default, PyroSim will check for updates on startup and display the relevant information in the Check For Updates dialog when one is available.
