ZBrushCentral

3d print exporter

I use the 3D print exporter to export my files as seperate STL files for 3D printing, but when I open it in Preform (my 3D printer’s program) they come out tiny, about 1/10th the size I exported them as, and their proportions, x,y and z are different than the one in zbrush. like lets say zbrush says when y is 50 x is 8 but then preform says when y is 50 x is 20. I update size ratios, I have tried exporting in inches as well as mm, and I have done this with dozens of files but this is the first time I have had this problem. I tried opening different files in preform and they came out fine so it has to be a problem with zbrush. anyone might know whats going on?