Hi Austofficegirl2013,
Welcome to the MSDN Forum.
This forum is for development related issues only, so I suggest you repost your question on the
Office Answers Forum for better support.
Before that, I think you can try to enable your extension name by steps below.
1. Open File Explorer.
2. Click Organize, then click Folder and search options.
3. Find Hide extensions for known file types, and uncheck.

Hope it helps.
Best regards,
Quist Zhang [MSFT]
MSDN Community Support | Feedback to us
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