[Adra]

1)
Yes, almost all authors here on Lotrointerface have throwed the towel.
The poor quality and the rarity of the skinning pack releases, and particularly the monthly breaking of the UI have discouraged/frustrated everyone.

2)
Only custom toolbars are affected by the "buttons don't push" bug. Universal toolbars work perfectly.
If you play in fullscreen mode, you don't need to change the toolbar scale to fix the buttons. Just calculate appropriate X and Y values for your own screen resolution on the line beginning with " <Element ID="ToolbarField" ".
The calculation rule is :

X = (Your game resolution width - your toolbar's width) / 2
Y = Your game resolution height - your toolbar's height

3)
Why trying to update the old Black Vellum since Isil skins have been stopped only a few monthes ago ?
There would be much less work fixing it.