I purchased an indicator but nothing happen after I clicked on the "Install on the terminal". What happen? - page 3

 
Diyon:

which one should i use as a default, IE or Edge ? and how to manage setting on metatrader , in order to make the Mt4 read certain browser as their default?

It does not matter which one is default.
You should have IE installed on your computer (I re-installed IE to the version 11 because I had a similar problem).

You can try on the other computer, because if Community tab was filled in correct way so it means that something was wrong with your Windows (or IE ..).

Reason: