In Linux it’s ~/.config/libreoffice/4/user/autocorr/acor_ro-RO.dat. Thanks.
Time has passed and I have forgotten what the steps were to make new changes to that same list! Can you remind me so that I can make a note of them for the future? Not only I have to remove forms that don’t have only one possible correction, but I have omitted to remove some forms based on the initial bug report.