Yes to both.
I actually get a black screen without editing the file in Restorator.
Coping the Aero theme, modifying it in WSB, saving and applying the theme (either via WSB or Windows Settings) - all is well.
Opening the theme again in WSB, applying any change and saving - the theme gets corrupt and I get a black screen.
It might have to do with some REG files I'm using. But reverting those REG changes (and signing out/in) does not solve the problem.
I'm attaching the theme, the images I've replaced and the REG files.
***
Exact steps:
I've changed the fonts in "Fonts, Colors, & System Metrics".
I've changed the font in "Taskbar & System Tray > TaskBand > Basic > TaskBand".
I've changed the images according to your instructions in
https://www.vistastylebuilder.com/forum/index.php?topic=2559.msg14618#msg14618.
I've changed the image in "Explorer & Shell > Explorer > CommandModule > BackgroundShineLayer".
I've changed the image in
msstyleEditor Menu > BARBACKGROUND (couldn't find it in WSB :) ).
(The problem exists after reopening the theme in WSB regardless of the last change in msstyleEditor).
Thank you very much.