Magic Music Visuals

I have accidentally scrolled over the little 'x' beside a number of my scenes, and have happened to click that 'x' multiple times. After, that, when the scene is deleted, I can't find a way to undo that action.

What should I do here?

The 'x' button does not delete the scene, it just hides it. You can un-hide it from the Folder View.
https://magicmusicvisuals.com/downloads ... FolderView
https://magicmusicvisuals.com/downloads ... ml#TabView

Excellent, thank you!

... I'd find an Undo for this situation helpful, such that the closed tab(s) were restored to their previous position rather than being appended.