You can update or upload your DxDiag by signing-in to your Age Insider Profile while on the machine that is associated with the DxDiag you want to upload.
🛠 Directions on how to generate a DxDiag can be found on THIS SUPPORT ARTICLE.
From your Age Insider Profile, under Insider Settings, you should see the DxDiag box. Click the Upload button or Update button to launch the uploading tool for you to upload an XML copy of your DxDiag. The tool will only recognize XML files generated by the DirectX Diagnostic tool; it will not recognize TXT files or files converted into XML format.
NOTE: Having an up-to-date DxDiag on file is important to heighten your chances of being selected for a beta opportunity. If you have upgraded your machine (such as hardware or changing Operating Systems) since last you uploaded a DxDiag, we ask that you consider generating a new DxDiag and uploading it to your profile. Thanks!