Please follow the instruction:
1. Choose Start > Programs > Gaaiho > Gaaiho PDF Suite/Gaaiho PDF Driver > License Information > Activate
2. Click “Activate” to open product activation dialog
3. Choose "Activate by SN" (Note: skip if you are not using version 3.0 or above)
4. Choose “Export the activation data" and click OK
5. Input the Serial Number, then click OK.
(You should have received a confirmation e-mail that includes the serial number)
6. Click "Save" to save data as a file with the extension file name "htm"
7. Copy the saved activation data file to any computer with Internet access, and use browser to open file
8. Click "Upload" on the web document
9. Download license file (.zna) and save
10. Copy license file back to the computer with Gaaiho PDF Suite/Gaaiho PDF Driver installed. Repeat Steps 1 to 2 and go to "Import the activation data". Double-click license file (.zna) and click OK.
11. Offline activation complete