# Core Engine Release 4.20
October 2024
We upgraded! What's new? Learn more about new features, technical changes and solved bugs in 4App Core Engine.
Note on upgrading: If you skip a version when upgrading, check all release and patch notes in between for important information. They apply cumulative.
Note on individualization: If your 4ALLPORTAL is highly customized or if you installed individual apps, please contact your implementation partner before upgrading. We recommend checking your custom contents, especially layouts and object renderers, carefully after an upgrade.
# Solved Bugs
- Fix update script 132.YW (works when upgrading from 3.x to 4.x) which had corrupted all search renderers with extended_search_comparator_list = null
- Fix loading values from file "translation_studio.properties" into the Translation Studio after reloading the Core Engine
- Fix incorrect loading priority for icons: PNG icons with the highest priority, before 4APIcon, before SVG icons with the lowest priority
- Fix setting incorrect values when manually sorting and editing tiles in a reference renderer
- Fix not working media conversion of 'file' module objects that combined the 'on_demand' cache control and 'switchToJpegIfNotTransparent' specifications
# How to Get These Improvements
- Upgrade 4App Core Engine to version 4.20