GDL Downgrader 1.0.0

First release of the GDL Downgrader — convert Archicad GDL objects (.gsm) to a lower Archicad version via Graphisoft's LP_XMLConverter.

Highlights

• Single object or recursive library downgrade (folder structure preserved)
• Automatic per-object source-version detection; smart converter selection
• Free target version choice; -compatibility only on a real downgrade
• Password protection detected and preserved
• Warning for GDL commands too new for the target version
• Confirmation before overwriting existing target files
• Bilingual UI (English / German)

Downloads

• macOS (Apple Silicon): GDL Downgrader-1.0.0-arm64.dmg — unsigned, confirm via Right-click → Open on first launch.
• Windows installer: build from source on Windows (see WINDOWS_BUILD.md).

See README / MANUAL for details.