Often this issue manifests itself when both Hoboware and BoxCar are installed on the same computer. To correct the issue, simply unmap DTF file in Hoboware. (If you use a weather station, energy logger, or U30, you might not want to do this as the DTF extension will open in BoxCar.)
- In Hoboware go to: File / Preferences / File associations.
- Click "UnMap" on the DTF file type line.