Mailspring 1.14.0 auto-update on quitting the application

Hello ,

I am wit Mac OS Catalina 10.15.7, so I need to use Mailspring 1.14.0 witch is the latest supported version, the problem is that Mailspring auto-update to actual version and stops working in Catalina.

I do not find this option in preferences.
How can I disable auto-update ?

Update: the auto-update is done when we quit the application.

I need a fix to be able to use Mailspring 1.14.0

Thnks