Documents vs. Templates

Table Branding Manager opens both templates (.potx/.dotx/.xltx and their macro-enabled .xxxm variants) and ordinary presentations/documents/workbooks (.pptx/.docx/.xlsx and their macro-enabled .xxxm variants) - fully, with no difference in what you can edit.

Why edit an already-created document?

Editing a table style does not, by default, retroactively update documents that were already created from that template - a document's table styles are normally a one-time copy, frozen the moment the document was created. Word does have an "Automatically update document styles" setting that can re-sync a document from its attached template, but it's off by default and easy to overlook, so most already-distributed documents still need fixing individually.

That's exactly the gap this app closes: instead of updating the template and hoping every existing document picks up the change, you can open an already-distributed document directly and fix its table style in place. If this happens a lot: there is an import-only editions that lets end users import table styles in documents. See Editions explained.

PowerPoint and Excel are different

Every PowerPoint presentation and Excel workbook is already self-contained - there's no attached-template concept the way Word has. So for PowerPoint and Excel, updating the style (by editing it or by importing an updated .ksstyle file) is the only way to update a table style in the document.