I did all, but it doesn't work. When I add the file, appears a window with the words: "no new objects added".
I could installed arcgis, spatial analyst and spatial analyst plus in another laptop and all was ok! The only difference with both laptops is 32 or 64 bits. I installed all in a 32-bit laptop but I can not install the spatial analyst plus in a 62-bit (I could install arcgis and spatial analyst). Maybe the spatial analyst plus doesn't work in a 62-bits system??