Hello there! Thank you for the report. We are currently investigating the issue, but could you let us know if it still occurs on newest version?
If you are too afraid to have ironmode savefile without achievement done, you can make a copy of your savefile before taking decision and save it in different folder, then replace it if needed.
If you are too afraid to have ironmode savefile without achievement done, you can make a copy of your savefile before taking decision and save it in different folder, then replace it if needed.