Thank you Petr , i have downloaded it , they put the download link and registration serial in the account info page of the user. the file size 77.4 MB and its version is 184.108.40.206
it has many export and import file types including obj files.
there are also Daz studio 4 pro and Bryce 7 pro also for free download.
i have searched in the morning if there is an exporter for m15 to obj files, and find that ThinEdge have this feature, if we add this to the OBJ2M15 utility then we have good tools in the Lab.