Hello Angela Negrão Marim 

You have an extra activation for your 2015 license, please try to activate that one and then you can try to reset the old one as described in this article: https://gateway.rws.com/csm?id=kb_article_view&sysparm_article=KB0038545

Thank you,
Sorin 

Hello Sorin

When I open Trados Studio and click to activate my license, it appears the option to activate the trial version only and not my license. How can I activate my extra activation?

Hello Angela Negrão Marim 

You need to click on Activate > Copy / Paste your activation code and click Activate again. 

Here is an article which describes the activation process step by step: https://gateway.rws.com/csm?id=kb_article_view&sysparm_article=KB0039555

Thank you,

Sorin

Hello, Sorin

I have already done that, but it didn't work. I don't know the reason.

Thank you,

Angela

Hello Angela Negrão Marim 

What happens when you do that? Can you provide more details? If you have any error message please send a screenshot.

Thank you,

Sorin

Hello, Sorin

When I try to activate the license, first the screen to activate the trial version displays and then the activation code is required. I put the activation code and the following screen displays:

Do you know what can I do to solve this?

Thank you

Angela

Hello Angela Negrão Marim 

Please try to activate your license offline as described in this article: https://gateway.rws.com/csm?id=kb_article_view&sysparm_article=KB0039784

Thank you,
Sorin

Hello Angela Negrão Marim 

Please try to activate your license offline as described in this article: https://gateway.rws.com/csm?id=kb_article_view&sysparm_article=KB0039784

Thank you,
Sorin