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.
Like many of us we are running into HD space issues at somepoint. My question is once APP creates master files (dark,bias,flat) am i able to delete the raw image files? Doing so will free up tons of space as sometimes i take 50-75 of each and if i can delete them all the better.
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Yes you can. Once you have the masters and you have tested them, there is no need to keep the raw images.
I have a folder with a calibration library: MasterDarks (for several exposure times, MasterFlats (per telescope configuration) and one Bad Pixelmap. I make new masters every season (new Flats when the camera has been off the scope) and keep the masters labeled by season. Works for me.