Hi! It's very simple. First, download the Admin Tools Professional package from https://www.AkeebaBackup.com/latest and save it to your local disk. Then, go to your Joomla! site's back-end, click on Extensions, Install/Uninstall (Joomla! 1.5) or Manage (Joomla! 1.6 and later), click on the Browse button, locate the ZIP file you just downloaded and click on "Upload and Install".
All of our software's ZIP packages are designed to be able to install, update and upgrade the component without having to do anything special. Trying to install the package through Joomla!'s extensions installer is all it takes :)
Nicholas K. Dionysopoulos
Lead Developer and Director
🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!