: A configuration file that tells the app which hardware the firmware is compatible with.

Have a specific downgrade issue not covered? Check the 7-Zip forums or consult your IT department's legacy file handling policy.

When you downgrade a ZIP file, you are often using older decompression libraries. Modern ZIP files contain safety checks against "Zip Slip" – a directory traversal attack (e.g., ../../etc/passwd ). Legacy decompression tools (the very tools that need downgraded files) .