In order to install the aqua web client you need the following file:
 
aquaWebNG-"your version"-Installer.exe
 
To start the installation double-click the file and click next:
 
 
 
 
After the installation a link to the web client will be available on the aqua 
landing page.
 
You can also directly visit the web client by going to "http(s)://<<yourAquaServerURLorIP>/aquaWebNG".