Free Trial Adobe Audition Export

Hello everyone,
Let me share with you a frustrating problem: I use the free trial of Adobe Audition. Therefore, I imagined that I could still use the "export" function of the software. However, after finishing all my recordings, I was unable to export the previously saved files. Maybe I'm bad at computing, but anyway, after watching lots of tutorials on the subject, I still can't do it.
In fact, when I try to export the audio mix (since I recorded on a multitrack), the software only offers me to export the " selected clips ".

However, even if I select all the possible clips, none is exported since I don’t see any downloaded mp3 file (I have also tried a lot of different formats). In fact I just see an empty file in my "Shortcuts" which cannot open (while I have audio players)

Anyway, here I am without being able to download my recordings, tired enough of the day ...
Thank you for your compassion and help.