I'm modifying an existing piece to reflect the change in seasons, and making use of the Selection Tool -- and for the life of me I cannot figure out how to turn the thing OFF -- I know I'll feel quite foolish when the solution is pointed out, but for now.....I'm stuck with my only recourse to close out the program, and begin again!
To turn off the selection tool (box drawn to mark section of pattern), simply click on the "stitch type" you want - generally the full cross-stitch right below the selection tool option.