I am using Polyphone(x64 version) to export a big soundfont (NEOGM which can be found at: https://www.youtube.com/watch?v=DIShiOEJSbw) It crashes after exporting for a while: cannot read file: "xxxxxx_tmp.sf2"
On bottom of main UI, file size shows a negative number. I suppose it's related to a 'signed int' causes issue when operating on a file bigger than 2G.