.7b file: how to open it on Windows

1 Windows app registers the .7b extension. Install one of them to open the file with a double-click.

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  NanaBox

  The third-party lightweight XAML-based out-of-box-experience oriented Hyper-V virtualisation software based on Host Compute System API, Remote Desktop ActiveX control and XAML Islands.

  Open source 1.7.1633.0 ★ 1.1K

Related guide: Change the default app for a file type in Windows