Thanks, I’m glad you liked it ^^
Unfortunately, Draw Over is not in active development, so I don’t think an eraser will come out anytime soon =/ But it’s got the Undo (Ctrl + Z) feature that you can use to “erase” drawings that got wrong, maybe that’s good enough for your use case.
One thing I thought of doing is a way to select individual shapes/drawings and being able to delete them one by one, but never got to implement this idea.