Now make a click to place this component anywhere on the ground. I have downloaded this model also from the 3D warehouse. Now you will have this window on your model. I will click on the Yes button of this pop box. You can go with Yes or NO according to you. If you click on Yes, then it will directly come on your model without saving. Once you click on the Download button, it will ask whether you want to use this component directly into your model or download it. Once you click, details of the chosen component will open like this. You will find a number of different windows component previews in it. Now you can search your desired component in the Search box of this dialog box, such as I want a window component, so I will search Windows in it. Make sure you have your internet connection is On. Now click on the 3D Warehouse option, and once you click, this dialog box will be open. Once you enable it, you will have a Warehouse panel which you can place anywhere on the toolbar area.