UPDATE FROM MABULA
I have had a very rough 2 months unfortunately health wise. I was struck 3x in a row with bacterial infections. The second infection occurred  after a routine hospital checkup and I became very sick. I had to rest and take a lot of antibiotics. Once I was recovering and restarting work 1 month ago, I again became sick. The infection was not yet gone, so even more antibiotics and rest was needed. Needless to say, it took a lot of my energy and I needed a lot of rest.
Finally, the infection is really gone and my energy is coming back step-by-step now and I have started work again. I am terribly sorry to have kept you waiting for support. I will address all outstanding questions and e-mails step-by step and will be on the forum daily from today.
APP 2.0.0-beta47 will come soon as well, a lot of work was already completed before I became very ill, so the release is also nearly ready for you. Beta47 will be much faster actually. Many workflows will be more than 2x faster, mosaics can even be 10x faster than before because registration really received a major boost... all compared to beta46. Â Before I release it, I will make sure that everything is working properly and then I will release it.
I am new to APP and do not understand what I am doing wrong. I have an Atik 460 mono with Astrodon 1.25 inch filters. I am only shooting narrowband. I stack my NB images separately but when I try to combine them in any programme (APP or StarTools) they will not allow me as they are coming up different dimensions. My Ha is 2806 X 2233. My O111 is 2838 X 2222 and S11 2841 X 2230. The native Atik 460 is 2750 X 2200 Pixels. I am not binning
Any ideas on how I can make my images the same please.Â
@michael-tweedy When dithering is applied between images or when guiding is not completely perfect, the individual subs for each filter will not line up completely which adds additional pixel rows and columns to the final stacked images.Â
In order to align them you need to do a star alignment and save the aligned images. Simply load the stacked images in tab 1 as lights and then go to tab 4 to align them. Once done, save the stacked frames. Then you can combine them in tab 9.
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Wouter
IT WORKED. Dancing for joy. Thank you very much