COPASI is a free Biochemical System Simulator software used for teaching and research. It is used widely in modelling biological, biochemical, and chemical systems.
It uses the INNO installer and as such, the setup.exe supports silent installation switches "/VERYSILENT /SUPPRESSMSGBOXES /LOG= "<filename>"
and the uninstall is straightforward from the installation location:
"C:\Program Files\copasi.org\COPASI <version>\unins000.exe" /SILENT
More information and the product download can be found at:
https://copasi.org/
https://copasi.org/Download/