Hi, Fernando 

Thanks for reaching out to us.

Please note that the official support language is English, and we have to use Google Translator to try and understand other languages. Since a lot can be lost in translation, we apologize in advance if we misunderstood some segments of your message, and we also ask you to please translate your future messages to English.

Thank you for your understanding.

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Can you tell me, do you already have the Lite version installed?

If you don't see the Activation Tab in the main plugin settings, it means that you have the Lite plugin version installed.

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Please follow the steps explained here, 

it is a step-by-step explanation of how you can safely remove the Lite version and install + activate the Full version.

Let us know how it goes and if you have any questions.