@BorisCallens Visual Studio 2017 is supported since release of 22.214.171.124 (25th April 2017).
@Vincent have you tried reinstalling Visual Studio or Xenko? Did you have previously Visual Studio 2015? It is possible that the uninstallation of a previous version was not properly cleaned.
As far as we can tell, the plugin should work fine for both Visual Studio 2015 and Visual Studio 2017 (there are in face two different versions of the plugin). I tried recently with both versions on Win7 and Win10 without issue.