Data created and saved in a newer version of IRONCAD cannot be opened directly in an older version.
Additionally, 3D data created in IRONCAD cannot be saved in a format that is compatible with an older version of IRONCAD.
To open data created in a newer version of IRONCAD, export the file as an intermediate format (such as Parasolid, ACIS, or STEP), and then import the exported data into IRONCAD for use.
When data is exported to an intermediate file, its design history will be lost and the model will be converted into a Brep part.
For information on how to edit non-history-based data (Brep), please refer to the following articles: