Moho 5.0.9 Batch Export crashes on OSX

[gont]

I am using Moho version 5.0.9 on a G4 Powerbook with 1 GHz, 768 MB Ram and OS 10.3.8 and every time I try to put more than one file in the batch renderer the program crashes (sometime with only one large scene)! What can I do?
I need to let my projects render overnight because every scene takes one to four hours.
(This happened when I used two monitors but also with one monitor occasionally)

Thanks
Andreas