Hi Aritz,
I have been working on a Chimera→ChimeraX exporter, and though it’s not ready, it’s close to ready for atomic data only (i.e. not surfaces, volumes, etc.), and it works well enough to handle the Mole output.  I have attached a file which is the result of applying the exporter to your data.  You can open the attached file directly in ChimeraX.
I will put the exporter into the Chimera daily build so that you can use it despite it not yet being fully ready for “official” release.  You can access from File→Export Scene… or via the “export” command.  The format name is ChimeraX and the file suffix is “.py” — so the command “export output.py” would be sufficient to do the export.

--Eric

Eric Pettersen
UCSF Computer Graphics Lab