Unity 5.22 Dbl clicking a C# file in the editor now opens a new instance of visual studio every time...

As the title says, ever since I updated Unity to 5.22 (from 5.21) double clicking a c# script in the project now opens a new instance of visual studio for each file I click. It has always opened it in the same instance if the project was already opened before this update.

Anyone else experiencing this and better yet, know if it’s fixable?

Thanks

@Darkworth , you can deleting the .csproj files and the .sln file in project dir. unity will recreated them immediately , and the files correctly opened in the same instance of vs.