Update outdated installers for windows
When using the latest win32 installer (3.14.2), and opening a gtk 3.18 .glade file, the project (gtk-sharp-test.zip) show an empty window.
When I run the example project with "dotnet run" (it is a netcore 3.0 project), I get the following result:
But when I open the included .glade file with Glade 3.14, here is the result:
I suspect either an incompatibility between Glade 3.14 and the GTK 3.18 file, or between Glade and a modified .glade file created for the GtkSharp project, but I don't know hot to verify this.