Data File Tools

You can use the setting in Tools > Options > Micro Focus Tools > Data File Tools to control the version of Data File Tools that is used as default.
Use Classic Data File Tools
When this option is selected, all actions that invoke a data file editor will use the classic version of Data File Tools.
When this option is not selected, where possible, the new version of Data File Tools is used. This version does not have the full functionality that the classic version has, and so actions that cannot be performed using the new version (for example, using IMS segment layouts) will be carried out using Classic Data File Tools.
Use New Data File Tools for supported options
This version does not include all of the functionality available in the Classic Data File Tools. The Classic Data File Tools will be used for these options.