just to chime in here, i'm on a Mac and i noticed that i can't enter in a number manually while in Run mode on 0.49 either (Edit mode is no problem, though). i can use the mouse to change the number by clicking and dragging, and holding down Shift while doing it allows decimal adjustment. but it doesn't seem possible to edit the contents of a number box by double clicking and typing a new number while in Run mode. i thought i remembered this being possible in earlier versions but maybe this is intended behavior? clarification appreciated!
best,
scott