take the download from your browser to your desktop and it should come up as a zip file. Left-click on the zip file to expand it to a folder. Open the folder and there should be a file named "ILU" . Right click it and select " open. If a pop up comes up with:
“ILU” is an app downloaded from the internet. Are you sure you want to open it?
just click "open" and then you should be ready to go. Have fun!