Since there is no official "downgrade" button, you need to rely on external tools or manual workarounds. A. Jukeblocks DAW Converter (Top Online Tool)
Ensure the old version of FL Studio has the exact same version of VSTs installed, or it will replace them with placeholders. 4. What to Expect from a Downgraded Project flp downgrader
When it gives the error, try clicking "Yes" or ignoring the error prompt. If it opens, immediate to a new file name. Since there is no official "downgrade" button, you
Ensure you have bounced any newer VST plugins to audio stems (WAV files). Open this package in the older FL Studio. Ensure you have bounced any newer VST plugins
Sometimes, if the version gap is small, you can bypass the error. Attempt to open the new file in the old version.
Since FL Studio updates are free for life, ask your friend to update to the latest version.