Microsoft Visio vstx templates can only be used in the 2013 and later version of the program and are not supported in any other software. So you have to use Visio if you are attempting to create a Visio document (.vsd) from these .vstx templates. Done through the File ► Save as.. function.
Convert Microsoft Visio 2013 template file to Microsoft Visio diagram document.
We found one software available in the database for this conversion.
Microsoft Windows software - convert vstx to vsd on Windows
A vector based diagramming software from Microsoft
Convert from vstx file format
|Yes, Microsoft Visio supports vsd file conversion as a target file type.||Yes||Yes||vsd editor||Yes||No||No||No|
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.