How to download a specific version of Unity in the Linux UnityHub AppImage?

I am using Unity Hub version 2.3.2 (AppImage)

OS: Ubuntu 20.04.1 LTS (64-bit) GNOME: 3.36.3

I need the Unity 2019.2.21 (10 Feb, 2020)

Obs: I already tried going to the download archive and clicking the green button ''Unity Hub'', but that doesnt seem to work, I guess thats because my unity hub is a AppImage? How can I configure it to open the link provided?