Click Activate this product in the main program window (alternatively, you can click Update → Activate this product, or Help And Support → Activate product). Figure 1-1
Click Use a purchased License Key.
Figure 1-2
Type your ESET-issued License Key into the License Key field and click Continue.
Where is my license key?
Your License Key was sent to you in an email after you purchased your ESET license.
If you need to have your license information resent to you, recover it here.
Figure 1-3
After Activation was successful appears, click Done. Figure 1-4
Click Activate this product in the main program window (alternatively, you can click Update → Activate this product, or Help And Support → Activate product). Figure 2-1
Click Offline License.
Figure 2-2
Navigate to the location of the offline license (.lf) and click Open.