How to set color scheme (text highlight) in KDevelop 5.6+

I used to have a color scheme for my KDE applications (previously used in KDevelop 5.3, KWrite and Kate). It is saved as *.katescheme . . But after upgrading to 5.6, it does not seems to have this available anymore? There is a color "scheme" selection, but it is a KDE Theme (e.g. Breeze), and do not support katescheme extension. . . How can I import my color scheme? (this takes quite some time to setup) .