We lost this ability with the release of version 4 and it really is a drag on creative productivity to have to wipe out the stack and rebuild it every time we want to try a different process sequence out.
Also, this time please correct the fundamental limitation you’ve imposed on our creativity and allow Upscaling to happen anywhere in the stack. For example Denoise typically makes sense before Upscale, but Remove and Sharpen may do better after Upscale.
