As you have already been able to check more than once, Windows and many other programs store the keys and passwords by hiding them under asterisks. The problem arises when you have forgotten what the precise one is, being unfeasible to recover it. In these cases it is when you need a program like Asterisks Password Viewer.
Asterisks Password Viewer allows you to view the keys that are hidden under the blissful asterisks.
Some of the programs that, for example, you can display the password are: Internet Explorer, MS Outlook, Outlook Express, The Bat, CuteFTP, FlashFXP, and so on.
You can free download Asterisks Password Viewer 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.