Sage 50 keeps asking to register, activate or update even though you did. This error causes data path files not updated properly, two or more versions using the same data path, and updates have not been installed properly. You need to run Sage 50 as administrator, update data path files, and create a new data path using the Sage 50 database repair utility https://www.askforaccounting.com/sage-50-keeps-asking-to-update-register-or-activate/