All recent Delft-FEWS releases require 64-bit hardware and OS. Deltares supports at maximum 5 versions. If still on an unsupported version it is strongly recommended to upgrade to a supported version.version status release date end of support 2021.02 supported Jan 2022 when 2024.01 is released (approx. Q3 2024) 2021.01 Jul 2021 when 2023.02 is released (approx. Q1 2024) 2020.02 Mar 2021 when 2023.01 is released (approx. Q3 2023) 2020.01 Jul 2020 when 2022.02 is released (approx. Q1 2023) 2019.02 Mar 2020 when 2022.01 is released (approx. Q3 2022)