Because your download is interrupted due to a network problem, the file size is not enough for installation to be activated. So please try again to download the setup file. During the download, remember to close all other running applications (even instant messengers) to optimize the process and avoid download interruption. 3-6. When I installed Demo version, I was confused by the Free Key form Back The Free Key ensures you to take more advantages of the Demo Version. The Form will keep coming up each time you turn on the Demo until you already register for a Free Key. The message box below will appear each time you click the button "Click to subscribe" but only one e-mail is delivered since then. If you do not receive your e-mail with Free Key, please check your Bulk folder for it. Otherwise, please feel free to contact our support team for help.