The TLX file extension is related to the CuteSITE and used for its builder files.
TLX file extension - CuteSITE builder file
What is tlx file? How to open tlx files?
File type specification:
The TLX file extension is associated with the CuteSITE a tool for Microsoft Windows that allows users to create web documents and web pages. The *.tlx file stores some kind of data used by CuteSITE.
CuteSITE is obsolete product.