FileMagic is a powerful file viewer that simplifies the process of opening, and handling a large range of file formats, especially hard-to-handle and diverse "dot" files.
If you need to work with standard formats like .docx, and even more obscure formats such as . https://www.filemagic.com/en/page-layout-files/dot-file-extension/1-solution-for-all-your-dot-file-issues/