The most reliable method is using official tools from the developer.
If automated tools fail, you can use an intermediary format like CSV. xdf to kp
Many users start with TunerPro because it is free or low-cost, accumulating a library of XDF files. As they progress to the more advanced features of WinOLS—such as superior visualization, checksum correction, and extensive database management—they need to bring their existing map definitions with them. How to Perform the Conversion The most reliable method is using official tools