You use FL 21.2; your friend is still on FL 20.8 because their laptop can’t handle the update. Before the fix, you’d have to bounce every track to audio. With the flp downgrader fixed, you send a single FLP file, and they retain MIDI control.
If you are ready to proceed, the workflow generally looks like this: flp downgrader fixed
In late 2024, a developer known within the forum circles as "Mokuna" (also associated with the flp.tools web service) released an update to the legacy downgrader script. This new version, often labeled as FLP Downgrader v2.1.0 (FIXED) or simply the "flp downgrader fixed" executable, addressed the checksum issue. You use FL 21
Key Changes in the Fixed Version:
A frequent question on forums is whether using an FLP downgrader violates Image-Line’s terms of service. The short answer is no, as long as both parties own a legitimate license. If you are ready to proceed, the workflow
Image-Line explicitly states that you cannot reverse-engineer their software to remove copy protection. However, the FLP downgrader does not crack or register anything. It merely converts a file format. It is the equivalent of saving a Word 2026 .docx file as a Word 2010 .doc file.
That said, Image-Line has implemented a native solution: "Save as" → "Export project data" allows saving back one major version (e.g., 21 to 20). But if you need to go back multiple versions (e.g., 21 to 12), the third-party fixed downgrader remains the only option.