Can't get rid of markdown extension I didn't install

Question

I've started redacting markdown files inside VSCode (currently VS Codium, but I face the same issue in VSCode as well). What bothers me is that I see an odd preview with Chinese hieroglyphs everywhere: I have no markdown extension installed (as seen on the left side of the screenshot). I tried to search for it, found extension's repo and looked for any similarly named files at %USERPROFILE%\.vscode-oss\extensions , but to no avail. Is there a way to find any markdown-related settings or somehow force the app to use a standard markdown editor or another extension? Thanks in advance.

Answer 1

Thanks to the great comment by rioV8 decided to just go through it manually.
Turns out, that the "Office Viewer" extension is causing it.
While I wanted to find a way to change it without deleting the extension, technically the question is answered.