Installation succeeds... but doesn't actually install it

I downloaded 2.4 and installed it, but I realised my key was only good for 2.3 after I launched VS (with 2.4 installed). So I uninstalled 2.4 and reinstalled 2.3 without opening VS in-between.

When opening VS the PHP project type is there, but the VS.php add-in isn't listed under Help > About, and attempting to create a PHP project type results in this error:

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Microsoft Visual Studio
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The application for project 'C:\Program Files\Microsoft Visual Studio 2005\PHP\PHPProjects\empty_project.phpproj' is not installed.

Make sure the application for the project type (.phpproj) is installed.
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OK Help
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I've uninstalled and reinstalled 2.3 several times and restarting VS, all to no avail.

Comments

    Do this from the command

    Do this from the command line

    devenv /resetskippgks