Once you have the software installed, you can right-click on the ".rar" file and select the extraction option. This might be labeled differently depending on the software you're using (e.g., "Extract Here" in 7-Zip).
If you are trying to set up your device using this link, here is the standard procedure and common fixes for frequent issues: http www51scopecn files setuprar top
Look for setup.exe or 51Scope_Setup.exe within the extracted folder. Right-click it and select "Run as Administrator." Once you have the software installed, you can