In CPU\Register window:
In pop-up menu don't exist menu for FPU register,
and don't rotate to debug register by clicking on bar button

hehe, first....

Doesn't exist menu for FPU registers, because is the default view, your are watching at them in the register window.

If you turn with the bar to MMX, mmx menu will chage to FPU

You are right, clicking on bar doesn't appear the debug registers... hmm.. why couldn't change the DRx values?? it would be a good chance