[chimerax-users] opening the session made with the new ChimeraX version using old ChimeraX

Dear colleagues, I made a session (cxs) in the newest ChimeraX. It contains the models only. How can I open it in the older ChimeraX version? Maybe I can save the session in a different format to be able to open with the older version? Unfortunately, I cannot update the older version on one PC. Thank you. Kind regards, Dmitry