Can't add modules to installed Unity editors

Issue

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:

Solution

Non 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!

Answered By - MohammadHossein Jamshidi