Two things - Slicer Settings and Can't Upload STL files?

I am trying to use Astroprint desktop and am unable to print. It tells me it can’t upload the file - wrong format ? but it is an STL file. I can’t figure out why.

Also, if I go into my slicer settings, there is a note about advanced settings at the bottom of the slicer page but there is nothing at the bottom ???


Screenshots please :slight_smile: