After updating our custom workspace for OpenBuildings Designer Update 5 we are getting these two errors:
During the workspace update, dataset content from a newer version of OpenBuildings Designer was accidentally introduced, including the Default.lay file in the ...\Dataset_US\Setting\ folder. The entries for "ProStructures Element" and "Curtain Wall Element" were first introduced in OpenBuildings Designer Update 7:
Therefore they post-date Update 5 which is why they aren't recognized and considered "unknown settings". In order to resolve these errors you will need to overwrite the default.lay file with the appropriate version from a valid Update 5 dataset.