Visual Studio 2017 is not detected by extensions for installation

Question

I'm trying to install an extension that's only supported on Visual Studio 2017. I'm using Professional, and I never had the RC installed, only the RTM version. VS 2017 isn't detected, however (see install log below). Other extensions install just fine, presumably because they also support VS 2015, which I do have installed. Those extensions do show up in both 2015 and 2017.

I tried a repair install, then completely uninstalling and reinstalling, but nothing has fixed the problem. The specific extension is Roslynator 2017.

How can I fix this so VS 2017 is detected and I can install extensions for it?

Install log:

3/15/2017 2:21:53 PM - Microsoft VSIX Installer
3/15/2017 2:21:53 PM - -------------------------------------------
3/15/2017 2:21:53 PM - Initializing Install...
3/15/2017 2:21:54 PM - Extension Details...
3/15/2017 2:21:54 PM -  Identifier         : 9289a8ab-1bb6-496b-9992-9f7ea27f66a8
3/15/2017 2:21:54 PM -  Name               : Roslynator 2017
3/15/2017 2:21:54 PM -  Author             : Josef Pihrt
3/15/2017 2:21:54 PM -  Version            : 1.2.51
3/15/2017 2:21:54 PM -  Description        : A collection of 170+ analyzers and 170+ refactorings for C#, powered by Roslyn.
3/15/2017 2:21:54 PM -  Locale             : en-US
3/15/2017 2:21:54 PM -  MoreInfoURL        : http://github.com/JosefPihrt/Roslynator
3/15/2017 2:21:54 PM -  InstalledByMSI     : False
3/15/2017 2:21:54 PM -  SupportedFrameworkVersionRange : [4.6,)
3/15/2017 2:21:54 PM - 
3/15/2017 2:21:54 PM -  SignatureState     : Unsigned
3/15/2017 2:21:54 PM -  Supported Products : 
3/15/2017 2:21:54 PM -      Microsoft.VisualStudio.Community
3/15/2017 2:21:54 PM -          Version : [15.0,16.0)
3/15/2017 2:21:54 PM -      Microsoft.VisualStudio.Pro
3/15/2017 2:21:54 PM -          Version : [15.0,16.0)
3/15/2017 2:21:54 PM -      Microsoft.VisualStudio.Enterprise
3/15/2017 2:21:54 PM -          Version : [15.0,16.0)
3/15/2017 2:21:54 PM - 
3/15/2017 2:21:54 PM -  References         : 
3/15/2017 2:21:54 PM -      -------------------------------------------------------
3/15/2017 2:21:54 PM -      Identifier   : Microsoft.VisualStudio.MPF.15.0
3/15/2017 2:21:54 PM -      Name         : Visual Studio MPF 15.0
3/15/2017 2:21:54 PM -      Version      : [15.0,16.0)
3/15/2017 2:21:54 PM -      MoreInfoURL  : 
3/15/2017 2:21:54 PM -      Nested       : No
3/15/2017 2:21:54 PM - 
3/15/2017 2:21:54 PM - Signature Details...
3/15/2017 2:21:54 PM -  Extension is not signed.
3/15/2017 2:21:54 PM - 
3/15/2017 2:21:54 PM - Searching for applicable products...
3/15/2017 2:21:54 PM - Found installed product - Microsoft Visual Studio Enterprise 2015
3/15/2017 2:21:54 PM - Found installed product - Microsoft Visual Studio Professional 2015
3/15/2017 2:21:54 PM - Found installed product - Microsoft Visual Studio Community 2015
3/15/2017 2:21:54 PM - Found installed product - Microsoft Visual Studio 2015 Shell (Integrated)
3/15/2017 2:21:54 PM - Found installed product - Global Location
3/15/2017 2:21:54 PM - VSIXInstaller.NoApplicableSKUsException: This extension is not installable on any currently installed products.
   at VSIXInstaller.App.InitializeInstall(Boolean isRepairSupported)
   at VSIXInstaller.App.InitializeInstall()
   at System.Threading.Tasks.Task.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()

Answer 1

From the log file it looks like an older vsixinstaller.exe tried to install your extension, not the one from VS 2017. It should be in a path like "C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\Common7\IDE\VSIXInstaller.exe"

Try to explicitly run it with Roslynator.VisualStudio.1.2.51.vsix as a parameter.