K4PC registration screen flickers, can't register
It's been so long since I've borrowed an .azw4 that I can't remember how to properly get it into Calibre, but I know I need to download it via K4PC first (I have no Fire tablet). Unfortunately, I seem to have uninstalled it and now when I install 1.24.50168 and go to Options/Register, the frame it opens refreshes so fast I can't type in my email address!
What do I do?
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