This is likely a weird request that is pretty uncommon. I actually could use a way to convert a blender .blend to a techne .tcn file. The reason why does not matter, if this is possible, please just let me know.
Impossible without programming an exporter. If you have the specifications for the file format, and enough Python knowledge, it should be doable.
Goodled, that you also can rename these as a .zip and view the xml and png inside. So, it’s juat a xml, you can figure out specs just from the source.