Press f3 in the editor and enter new numbers for rotation for that object. There are 4 numbers. The first 3 indicate which axis you want to rotate(x, y or z). This is indicated by placing a 1 in that spot. A zero indicates that axis won't rotate. The last number is the degree of roatation. Play around with the numbers. You can wind up with some funky shape if you don't do it right.
Solo Hans