Your computer will display warning messages during the download and installation of the application. This is expected and perfectly safe. Depending on your operating system and browser, different warnings may appear. Note that the following guides are for Safari and Chrome respectively. Slight alterations may be required when using alternative browsers. For example, you might have to select to keep the program during the download process.
Download the program from the provided email upon purchase and open it from the downloads area of your computer. When the NLVM icon appears in a white box, right click and hit open. A popup will appear. Close the popup and open the program again in the same manor. Another popup will appear. Select "Open". The program will then start the install process.
Download the program from the provided email upon purchase and open it. A blue warning message will appear. In the warning popup, select "more info" and then "run anyway". The program will then start the install process.