PixiEditor/PixiEditor.UpdateInstaller/AssemblyInfo.cs

using System.Windows;

[assembly: ThemeInfo(
    ResourceDictionaryLocation.None,
    ResourceDictionaryLocation.SourceAssembly)

// ResourceDictionaryLocation.None - where theme specific resource dictionaries are located
// (used if a resource is not found in the page,
// or application resource dictionaries)

// ResourceDictionaryLocation.SourceAssembly - where the generic resource dictionary is located
// (used if a resource is not found in the page,
// app, or any theme specific resource dictionaries)
]