Problem with .3ds export


My 3d logo is finished, I’ve got to export it in .3ds file, unfortunetly, I can’t do that with Blender Export .3ds.
For information, my logo was 50ko (with curves), now that everything has been converted into mesh, it’s 50Mo.
When I try to convert to .3ds , it takes a very long time, add finaly crash.

Is there a way to simplificate my file (50Mo is perhaps too much for export it into .3ds)

An idea ?