A dlx file extension is related to the Complete Works app and used for its data files.
There is one other file type using
the DLX file extension!
.dlx - Sony VDU file format importer
DLX file extension - Complete Works data
What is dlx file? How to open dlx files?
File type specification:
The dlx file extension is associated with the Complete Works application that was developed by Toplevel Computing in 1996. The dlx file stores various data used for internal purposes of the Complete Works.
Complete Works is obsolete product not supported by Toplevel Computing.
This dlx file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.