Facet Explode doesn't work in the Molflow 2.6.48. Probably because of missing option "boundary correction". In the 2.5.6 version this option exist and therefore Facet Explode works.
Thank you for reporting this. I'll release a fix in the coming days.
I've uploaded version 2.6.49 where the Explode command works again.
Thanks again for the feedback!