There was a download of RxTools 22.1.0 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The software lies within System Utilities, more precisely Device Assistants. This free tool was originally produced by Septentrio N.V. We recommend checking the downloaded files with any free antivirus. The most popular version of the tool is 17.1. The common filename for the program's installer is rxlogger.exe.
From the developer:
RxTools is a combination of applications that work with any of the latest Septentrio GNSS receivers. It offers a suite of GUI tools for monitoring and configuring receiver operations as well as logging and downloading SBF data files. There are also tools to analyze the SBF data files and convert them to various other formats.
You may want to check out more software, such as EasyGPRS, which might be similar to RxTools.