This patch update includes a bunch of bug fixes. It also introduces new features such as importing tiles, map, actor, and font assets, or project icon, and icon of desktop builds from .psd files, and generating font and i18n reference code.
Tutorials: https://paladin-t.github.io/kits/gbb/learn/index.html
See full changelog: https://paladin-t.github.io/kits/gbb/documents/changelogs/Changelog_v1.12.1.txt