I am using ArcGIS for the first time and am trying to replicate exactly what has been done here. Step 5 asks to "Select the Input_NetCDF_layer and an Output Folder. Click OK to run the tool." - unfortunately, there isn't a dropdown that appears for me in the tool in ArcCatalog to pick the netCDF raster layer that I have open in ArcMap. When I try to navigate to the folder with the netCDF file, that doesn't open either. Any suggestions for how I can get around this?