Hello Zyklon!
This is a known bug which we are already working on. You are right, the shopping basket icon is not there. To insert license in Android SecureLine tap on the text saying how many days of you trial remains. On the subscription screen, tap on the "Use voucher" text in top right corner of the app. There, you can insert your voucher key which you have received. There is no need to reinstall the app.
Hope it helps!
Cheers,
Tomas