The file is a compressed archive typically associated with Asset Visualizer 2022 (AV2022) , a tool used in the BVE Trainsim community for previewing and managing 3D railway assets. What is "Av2022 prev.7z"?
: If the previews appear white or gray, ensure the prev folder structure remains intact after extraction.
Are you currently or just trying to organize your object library within BVE Trainsim?