in Script > Handwritten 101,212 downloads (1 yesterday) Free for personal use. Since Catalina is still in the process of completion and a little buggy, it'll end up on the App Store soon. If your X-Plane 11 setup is heavily enhanced with add-ons, you may want to remain with Mojave.
Catalina & X-Plane 11 While X-Plane 11 is compatible with Catalina, a number of users have reported problems with third party add-ons and Catalina’s increased level of software security.
