1. Open the stand-alone STEM Corrector tool.

2. Click "LOAD" button at the left-lower corner. Holding CNTR, choose both "cube drift left-down original.dm" and "cube drift left-down rotated.dm3" files. Read the names of loaded images at the top of the tool, ensure that the original orientation image is at the left while rotated one is at the right. If it is not the case, switch them by clicking  the "Exchange" button in between images.

3. In the bottom of the tool disable "use FFT". Press "LINEAR". 

4. The linearly corrected images appear. If you wish to see them in the same orientation, click the knob rotate under the right image.  Click the button "Frames" in the lower part of a band between the images to see how the images were deformed via affine transformation.

5. Non-linear correction is not useful in this case.