Can't add modules to installed Unity editors

Question

I'm trying to add the Android SDK Module to an Editor that I have installed on my PC.

I've looked it up online and the guide available here states that there should be an "Add Modules" option available from the menu but it is absent from the menu when I open it in my Unity Hub:

Answer 1

None of above answers worked for me. The answer is here:

1. first locate your editor from unityhub
2. quit from unityhub completely
3. go to this path:

C:\Users\username\AppData\Roaming\UnityHub\

4. find this file: editors.json
5. locate the line of your desired version :

{"2019.4.15f1":{"version":"2019.4.15f1", . . .

6. At the end of this line change "manual":true to "manual":false
7. reopen unityhub again and enjoy!

Answer 2

I've solved the issue by reinstalling the Unity Editor version I was using via the Unity Hub.

It seems that Unity Hub doesn't have the option to add modules to Unity Editor versions which have been installed using the Unity Installer instead of Unity Hub itself.

It is worth pointing out that Brian Choi's answer is a valid workaround, however I wanted to use the modules functionality of Unity Hub.