I just purchased my Surface Pro 3 for the main purpose of screenwriting/writing on the go. I installed Final Draft, and every time I hit the "Backspace" it undoes everything I've just typed/fixed. What gives? If this continues, I can't use this computer. It ONLY happens in Final Draft. I'm anxiously awaiting the FD app, but until then, I need to work. Has anyone else dealt with this? How can I fix it?