When you purchase AIMS you will be sent licence file and a link to download the installer for AIMS via email.
This will download a zip file.
Create a temporary folder on your C drive, such a 1temp.
Unzip the file into the temporary directory and you will have two files:
The PDF file is an installation guide.
The visualaims_setup.exe file is the installation file. You may not see the .exe extension, depending on your windows settings
The save the licence file, aim.lic, you received in your original welcome email into the temporary directory