Does anyone know if it is possible to add a non standard file extension to the 'Save As' file type selector. MicroStation happily accepts different extensions e.g. .RCD, .ACH, .LAY... but when trying to save with one of these preffered types .DGN is added e.g. MYFILE.ACH.DGN
I've not been able to locate any discussions on this, it would be good to solve if there is a solution.