The popup table shown on the flowsheet objects doesn't get updated when UOM are changed, contrary to all other exposed data. The update happens only after a flowsheet recalculation.
Version 3.4 Build 5589
Fixed in commit https://github.com/DanWBR/dwsim3/commit/a6e98c36213ac56e690b7c32380748d780a92b6e
Fixed in commit https://github.com/DanWBR/dwsim3/commit/a6e98c36213ac56e690b7c32380748d780a92b6e