Look for active developer communities, documentation, and source code. If a tool's source code is completely hidden and hosted on an anonymous file-sharing site (like MediaFire or Mega), treat it as malicious.
This is a critical safety feature. The TOOL Calibration section in the GUI allows you to re-calibrate the gyroscopes and accelerometers. If your drone drifts or behaves erratically, this tool is the first place you should go. naza tools v10exe download link
Some of the key features of Naza Tools V10 include: Look for active developer communities