Downloader does not work!

Hello,
i have this when i try to execute the installation of simbrief downloder. I tried to install it an other time, but no success. Could you help me ?
Thanks

Hi, this indicates a permissions issue accessing your application data directory.

Try browsing to C:\Users\<username>\AppData\Roaming\ and deleting the entire “SimBrief Downloader” folder.

If this doesn’t work, you might need to repair or reinstall Windows.

Best regards,