Hello @Edoardo_Lanzini , welcome to the forums!
On PC and Mac, you can see the Zwift version at the bottom right of the Log In tile when the Zwift App launches (on mobile platforms and Apple TV, it’s visible at the bottom right of the log in screen). You won’t often need to check your Zwift version, since the launcher will update for you as soon as possible.
The issue on this thread was actually closed on the back end and did not require an update to fix. If you are able to see the option to create custom workouts on your Mac, but are having trouble editing the workouts you create, you are experiencing an issue that we are still fixing.