How do I stop Dia making ~ files?

[E Drummond <maggoty haggis gmail com>]

Hi,

I am using Dia 0.96.1 and its great, except for the fact that it
clutters up directories with .dia~ files. I looked all through the
preferences and tried googling, but I could not find a way to disable
this "functionality".

Is there a way to disable it?

Thanks,
Erin