Desktop version 4.6 error

I have just downloaded the desktop version 4.6.
When clicking “languagetool.jar” the program opens and displays the example page correctly (in Dutch).
But when I open a .docx file, the text appears in all kinds of symbols but not in regular readable text.
Any suggestions?

languagetool.jar doesn’t support .docx files (or any other files that are not plain text).

I see! Any plans to include .docx files in the future?

Sorry, no. The Premium version of LanguageTool has an add-on for Word, though.

May I ask: when you work in an sdlxliff-file - the target side. Does LT do its job in that case? Does it recognize this target as .txt?