Issues with Marvel Theme (Stacks do not show up)

Oh, I thought that the issue was stacks’ labels not showing up. I see this is fixed now.

Missing stacks are probably installed in a wrong directory. Do you have multiple versions of RW installed?

I would suggest that you try to reinstall single stacks again, but this time do it by dragging them to the icon of RW’s version that you are using. Then, restart RW and maybe even restart your Mac.