I’ve just uploaded a new version of SmartDown. This is v 0.9.1.
The “Preview bug” introduced in previous version has been fixed.
I’ve focussed my work on theming and you have new themes with a better support. In order to have a full night mode, I’ve also added a new preview template matching the dark theme.
Here is a screenshot of the new monocromatic theme (idea from a SmartDown 1 user)