Bill - you have to download from the beta section of stellarium.org. On Sep 29, 2014, at 2:47 PM, Bill Lovegrove wrote: > We are currently using 0.12.4, which is working. > > We tried 0.13.0 which is not working - Spheric mirror distortion is > grayed out. I don’t know how to see the fourth version number to see if > we have 0.13.0.91 or not. > > > On Sep 28, 2014, at 11:21 AM, Alexander Wolf