My interface don't have "piano" icon nor "stable" icon

There is no Stable Note icon on Main Menu, only Guide. how to fix that? thx!

Hi, the “Stable” button is the same as the “Guides” button. “Guides” shows which notes are in a a chord and thus are stable.
The piano can be enabled in the preferences where it says “Show Piano”.

Please let me know if this helped!