
Launch AlibreScript.
Then from the tree open the Import and Export folder and select Part Exporter.
A window similar to the one circled in yellow will open.
Select the folder that contains all the parts of the assembly, then the destination one, finally the format and start the script with the green play button on the ribbon or by doing CTRL + R.
Let me know if you can or should I be more explicit.
Regards,
Francesco