Step 1 - Login to your vBulletin Admin Panel and go to following location :
Plugins & Products -> Manage Products -> Add/Import Product
Step 2 - Specify following options :
Import the XML file from your server : ./packages/adiinviter/xml/adiinviter_product.xml
Allow Overwrite : Yes
Step 3 - Click on Import button.
Step 4 - Now refresh your browser and you will see the AdiInviter Pro menu on left side in your vBulletin Admin Panel.
Step 5 - Expand AdiInviter Pro menu and click on AdiInviter Control Panel.
The AdiInviter Pro installation will start. Simply follow the instructions on screen and finish the installation process.
Step 6 - Once you see the message Installation Complete, remove the installer files and folders located at following location on your server :
Note - Don't forget to remove the adi_install/ folder entirely from your server.