I tried to use DNSPY to reverse engineer the .net exe, the app crashes when trying to read the app.xaml file from plutonium.app.updater.exe, i'm not good with this stuff but it seems that the error is not on my side but on an unhandled exception from the app itself.
also when reading the xaml files it crashes when reading the:
{pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Clock.xaml}
now i'm no Einstein but this doesn't seem my fault.