Topaz DeNoise is not allowing to drag photos

For some reason Topaz noice it all suddenly lost the top box where you are able to use all the buttons as undo and shrink the window. For this reason is not possible to drag the photos anymore and makes much harder the use this. What can I do to make it work again? I already tried to uninstall and install again.

I take it you mean DeNoise… where are you trying to drag the image from, what type of image is it, is DeNoise open at the time?