IBKR recently introduced a policy whereby TWS and Gateway (all versions) must use SSL for the connection to their servers. If the relevant setting in the login dialog is not selected, the user is prompted to restart using SSL or to exit the application. Needless to say, although choosing to use SSL made a permanent configuration change such that this dialog would not be seen again, this action is extremely intrusive to those running TWS and Gateway automatically (for example using IBC, perhaps on a headless remote server).
Since not using SSL is now useless, this release ensures that when IBC is started SSL will be pre-selected in the login dialog.