A Demeter question - Is the memory limit hard set in Athena?  I know that I can change the 50 dataset limit, but can I increase the memory to handle more data as I have a relatively large set of spectra (~150)?  I have installed and tested Larch, but I do not see an option to run difference spectra in Larch GUI unless I missed something?  I am running windows virtualization (win 7 - 64 bit) Demeter if that affects the memory question.