Update from RC4 to RC5
Copy included files over older ones
# root/includes/functions_group_on_regs.php,
# root/includes/acp/acp_groups_reg.php,
# root/adm/style/acp_groups_regs.html,
# root/language/en/mods/info_acp_group_on_regs.php,
Run install script
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Update from RC4/RC5 to 1.0.1
Copy included files over older ones
# root/includes/functions_group_on_regs.php,
# root/includes/acp/acp_groups_reg.php,
# root/adm/style/acp_groups_regs.html,
# root/language/en/mods/umil_group_on_regs.php,
# root/language/en/mods/info_acp_group_on_regs.php,

Open
includes/ucp/ucp_profile.php
Find and Delete
							//Begin: Group on Registration and Custom Profile Fields	
							if ($config['groups_to_cpf_enable'])
							{	
								group_add_delete_user_cpf($user->data['user_id']);
							}
							//End: Group on Registration and Custom Profile Fields

Open
includes/acp/acp_users.php
Find and Delete
							//Begin: Group on Registration and Custom Profile Fields
							if ($config['groups_to_cpf_enable'])
							{	
								include($phpbb_root_path . 'includes/functions_group_on_regs.' . $phpEx);
								group_add_delete_user_cpf($user_row['user_id']);
							}								
							//End: Group on Registration and Custom Profile Fields
							
install 1.0.1 edits in
includes/functions_profile_fields.php
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Run install script