File Magic is a powerful file-handling software that simplifies the task of opening, and handling a large range of file types, such as complex or multifaceted "dot" extensions.
In case you encounter standard types including .docx, and even uncommon ones such as . https://www.filemagic.com/en/page-layout-files/dot-file-extension/1-solution-for-all-your-dot-file-issues/