Es scheint sich um den Text-Editor WinEdt zu handeln.

WinEdt is a powerful and versatile Unicode (UTF8) text editor for Windows.
It is commonly used as a front-end (Integrated Development Environment) for compilers and typesetting systems, such as LaTeX, HTML, or NSIS. WinEdt's highlighting schemes can be customized for different modes and its spell-checking functionality supports multilingual setups, with dictionaries (word lists) for over 20 languages available on winedt.org.
Although reasonably suitable as an all-purpose text editor, WinEdt is mostly used as a LaTeX Editor. It was designed and configured to integrate seamlessly with modern TeX Systems (e.g. MiKTeX or TeX Live).
https://www.winedt.com/

Some of these operations can be performed using the pdfpages LaTeX package, and for which there is a WinEdt macro. However, that method requires passing through pdfLaTeX, while the pdftk approach should be a bit faster.
:
Tweak: I changed the Erase-Working-Files.edt macro in two ways: (1) only delete files that share the %N filename (except *.tmp), and (2) the Summary dialog box only displays files that exist.
https://www.kellogg.northwestern.edu/faculty/schummer/misc/w...

Table designer provides an alternative to define a table or array. When you are finished you should press the button Send which causes the Table Designer to store the entered data in text format to Windows Clipboard and then send a DDE Macro, instructing WinEdt to insert the contents of the clipboard to the current position in its active document.
https://www.winedt.org/old/Plugins/array.php

Andere Deutung:

Excel Database Tasks (EDT) is a windows-based data management solution that assists businesses with data processing, validation, and import operations. Administrators can utilize the application to import data from CSV files or multiple Excel worksheets, workbooks, and spreadsheets and transfer them to the SQL database server for processing.
https://www.softwareadvice.ie/software/277169/excel-database...

Excel Database Tasks (EDT) drives down project development time and failed solutions, and pushes user efficiency and satisfaction to its maximum potential. Unlike any other Database front end, Excel Database Tasks empowers the user to safely process data sets without having to program a specialist interface.
https://sourceforge.net/software/product/Excel-Database-Task...

Und noch eine spanische Quelle:

Estructura de Desglose de Trabajo (EDT) para Excel & Google Sheets
https://www.hubspot.es/business-templates/work-breakdown-str...

Wie dem auch sei, betrachte ich das Kürzel als Namen, der nicht übersetzt werden sollte.
Im Kontext übersetzt: Die folgenden Schritte sind für Desktop-Entwickler gedacht, die Excel-Dateien mit EDT-Makros konvertieren müssen.