TextMaker text editor supports Microsoft Office formats (Word, Excel, PowerPoint), so you can simply re-save .tmd documents as .doc, or .docx files using the File ► Save as.. function. It might not be perfect, but probably works except for some unique formatting.
Convert TextMaker document to Microsoft Word Open XML document.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert tmd to docx on Windows
A reliable word processor from SoftMaker Office suite
Convert from tmd file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.