Unfortunately, EZDome will not actually create a physical sIBL, it will create a preset that is stored and used in the app. To create a new preset from scratch, select the New button. The New+ will create a preset with the existing image and settings that appear in the app automatically or from an imported sIBL. As I mentioned in the previous post, the only software that can convert an actual HDR to sIBL is sIBL-Edit which I use on a regular basis. It gives you greater control over exposure settings on each aspect of the image. But, unfortunately, it is only available for Windows and Linux and I am not aware of any other software for MAC. Again, if you are only interested in using the HDRIs in EZDome then the New button is the way to go on the app.