I’ve used toonboom for creating a few test animations, and haven’t hand any issue with the drawing view.
I don’t know of anything that’s changed, but now no matter what I open, even the original tutorials, the drawing view is grey, and the “window” drop-down shows the drawing view checked but greyed-out.
I can see all of the exposures with thumbnails, but there’s nothing to draw on.
The most obvious thing to check is for an image element being selected. You can’t draw on an image element so that would account for tools being grayed out. If this condition persists when you have a drawing element selected then that’s not right. -JK