Program updates (patches and service packs) are regularly available to update your installation. The program downloads and installs these service packs automatically.
Provided you have administrative rights to your computer, ATLAS.ti checks for new service packs upon start up (this requires an Internet connection). If a new service pack is found, you will be informed and asked to install it.
To update ATLAS.ti manually, go to File > Options > ATLAS.ti > Check for Updates.