The official, free utility is 7-Zip for Windows. Alternatives include WinZip or Unzip One .
Right-click the file and select "Extract Here" or "Extract to FZNJ06/" from the context menu. FZNJ06.7z
To access the contents of this file, you must use a utility capable of decompressing the 7z format. The official, free utility is 7-Zip for Windows
Below is an overview of what this file format represents and how to safely handle it. Understanding the .7z Extension FZNJ06.7z