Hi,
You can add this command to File menu by the following steps:
Tools->Customize->Commands tab->Click "Rearrange Commands" button->Select "File | Open" from Menu Bar dropdownlist->and then Click Add button->Select "File" from Categories and then Select "Open Web Site" from Commands->OK.
You also can try to click Reset button on bottom of "Rearrange Commands" window to reset menu.
If this doesn't help you, please run "devenv /resetskippkgs" from Visual Studio Command Prompt to merge the resource metadata that describes menus, toolbars, and command groups from all VSPackages available.
I look forward to receiving your test results.
Thomas Sun
Microsoft Online Community Support
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