Toonicorn, on the other side of the coin, I've been using Xara products for 3 years, or so, and haven't thought once about using or needing an eraser tool. Other tools, yes! An eraser, no. Vector programs are about lines, curves, shapes and their manipulation using the nodes/points that comprise them with the Shape Tool (F4). Other tools are also handy when combined with Add, Subtract, Intersect and Slice shape operations, and the overlapping of shapes/objects.

You may want to take a breather and try one of Gary Priester's excellent XaraXone Tutorials. I HIGHLY recommended them. I'm thinking that the recent Rubber Ducky Tutorial would be a great place to start. I guarantee you'll learn at least one new technique in addition to node manipulation.

Give it a try!,
HayTay