For me it goes in the folder C:\Program Files\Image-Line\FL Studio 20\System\Config\Typing to piano Need the the seventh chord or diminished chord rows? You could make another layout yourself if you need them (and please comment it below!) How to Install The top four rows of this FL Studio layout:
Here is my favorite accordion fingering chart: FL Studio support custom layouts for the 'typing keyboard to piano keyboard' feature, and I made one to represent the top four rows of an accordion! The left-hand bass side of the accordion (the stradella bass system) is laid out to make playing roots of chords and common chords very easy, and it's laid out using the circle of fifths to make the common chords (V and IV) very accessible.
