Thank you for your answer.
But I don't want to download a trial version : I have paid a 99,90 € license : I have a card with a key number and message saying that I have to go to www.adobe.com/go/getserial
When I enter the key number on this site, I get a serial number and a box "télécharger". When I click on the box "télécharger" I get the error message.
Mireille