Hi Jack
I'm not sure if this works (Juan wrote the process, and I am unable to test this here). Try changing the name of the identified target image. It is located in one of the retractile boxes.
Anyway, I'll tell you my workflow to register several images, with similar locations for the sample stars. I proceed as usual for the first pair, but, before cancelling, I create a new process icon with the instance. Then, I cancel, open a new instance and select the new reference and target images. Now I import all the samples by dragging the process icon and dropping it in the bottom of the DA window. This speeds up things a lot. Now, I activate the tracking option, and set the zoom of both images to 1:1. The last step is to quickly check that the pairs are well located and apply the instance when ready.
Hope this helps.