Trados says my license is invalid

Question

I purchased a new computer and I'm trying to activate SDL Trados, I have SDL Trados Studio 2017 Freelance Plus . 
 So I did not deactivate the license on my old computer, as it should work here as well, because I have Plus. 
 However Trados shows the message that my license is invalid. 
 I have now Trados 2021 installed.

Sorin Perta · Answer

Hello Anastasiya Rusova 
 One of your licenses is still available for activation but you can`t activate it in Studio 2021, you can only use it in Studio 2017. 
 Thank you, 
 Sorin

Sorin Perta · Answer

Hello Anastasiya Rusova 
 You need to install Studio 2017 and activate it. Studio 2021 normally works in Trial mode for 30 days but if you don`t use it you can uninstall it. 
 Thank you, 
 Sorin

Trados Portfolio > 2. Licensing and Installation

Trados says my license is invalid