I am opening STP files in Solidworks 2018 SP4.0. My System Options in the Import Tab has the Unit set to File Specified Unit. The native files were designed in IPS units but they are opening in MMGS. I am creating DXF files and for every part of the assembly that I pull out I have to manually change the units in the Document properties individually for each and every part. I have to do this even after changing the units from the top level assembly. Does anyone else have this problem?

EDITED BY MODERATOR: Moved to the Import/Export space. Please post in the appropriate space when there is one.