If you maintain add-ons

Prepar3D (pronounced "prepared") is a high-fidelity visual simulation platform developed by . The release of version 4.0 marked a milestone in flight simulation history by transitioning the platform to a 64-bit architecture . This upgrade effectively eliminated the "Out of Memory" (OOM) errors that plagued 32-bit simulators for decades, allowing for vastly increased complexity in aircraft and scenery.

Prepar3D v4 Professional Plus 4.0.23.21468 is a powerful simulation platform that offers a wide range of features and capabilities for professionals and enthusiasts alike. With its realistic visuals, advanced weather and climate simulations, and real-time physics, Prepar3D is an ideal choice for various industries, including aviation, maritime, education, and research.

However, some legacy add-ons (e.g., specific military training modules) were coded specifically for v4.0’s initial APIs and break in later versions.