This version fixes some minor bugs related to new c++ compiler versions. It still represents the published version in Reeg J, Heine S, Mihan C, McGee S, Preuss TG, Jeltsch F (2020) Herbicide risk assessments of non-target terrestrial plant communities: A graphical user interface for the plant community model IBC-grass. PLoS ONE 15(3): e0230012. https://doi.org/10.1371/journal.pone.0230012