Hi Serena Valentino

You don't need to deactivate the 2019 version via the Help tab activation link in Studio 2019.

 Instead, follow the instructions provided by Steven Whale here:

How to install Studio 2019 and 2021 side by side

(Edited)

For anyone else finding this thread in future, who really does want to deactivate Studio, follow this procedure:

Click on the 'Licensing and Installation Assistance' dialog bottom left of your screen:

That will open up an Online Chat box:

Click on 'Reset License'

All the best, 

Ali 

Thanks Ali, good to know!

I thought it was necessary to deactivate one version to use the other. Thank you for you precious help. 

Nice day

Serena

Sorry Ali, i have just tried to upgrade the programme (following the procedure indicated), so i went in my account and try to download the upgrade available, but this failed and the following message appeared: 

In order to process this upgrade, please return any in use activations.

I think it is related to the deactivation of the previous version..

What do you think?

Thank you so much!

Hi Serena Valentino

I was going on the information provided by here:

How to install Studio 2019 and 2021 side by side

Now I would recommend going here:

Licensing & Installation problems

The above link will take you here:

Then click on 'Reset License', select your license type and take it from there.

If that doesn't work, try filling in the following form:

Pre-chat form

All the best,

Ali

Hi Serena Valentino

I was going on the information provided by here:

How to install Studio 2019 and 2021 side by side

Now I would recommend going here:

Licensing & Installation problems

The above link will take you here:

Then click on 'Reset License', select your license type and take it from there.

If that doesn't work, try filling in the following form:

Pre-chat form

All the best,

Ali