File extension thmx is a Microsoft PowerPoint 2007 theme file (template). This feature only include in Microsoft Office 2007. File extension thmx make you quicker your presentations in Microsoft PowerPoint 2007 easier to create theme, including colors, effects, graphics, and the fonts.
Sometimes, Windows can not open files with thmx extension bacause you may have registry errors or unappropriate program is installed on your computer. To fix this, I recommend you to use Driver Detective software. This software is easy to install and free. Driver Detective can scan your file extension error and fix the error less than one minute. Before you install Driver Detective software, make sure that you have internet connection
Operating System: Windows