Adobe Audition offers audio export from its own audio sessions (.sesx) to several audio formats, including Wave PCM format for uncompressed audio. So you can use File ► Export function to convert sesx to wav once you have imported the .sesx file to the program.
Considering the support of .sesx sessions in other programs is pretty limited, it is unlikely you can achieve sesx to wav conversion by other means.
Updated: October 19, 2021
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