I have no idea what the problem is but.......... I would uninstall all software related to it (Sony and Calibre and Adobe) then reboot.
I would then plug the reader in and see what happens. I would wager it would not crash. After that I would try to drag/drop or copy/paste a book onto the reader, and see if it works. Then I would install Calibre. I would not install the Sony software. ..... I wish you well my friend.................
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