Activate Your License Code
If you received a voucher or license code, the next step is to activate it directly in Outlook. Please open the email account that you would like to link to Wunderlist for Outlook. Make sure to have already created a Wunderlist account and installed the app in the first place, otherwise the voucher cannot be processed.
Now, please open the Wunderlist tab and click on the "Purchase" button.
A new window will appear in which you have to select "Redeem Voucher." Here you find the section to activate your lifetime account.
The last step is to fill in the empty box with the voucher code. After completing the purchase your license is activated immediately and automatically.