Whether or not to connect to the most recently used database when starting the designer.
If checked, the system will automatically connect to the most recently used data source at the launch of the designer; if not, the system won’t connect any data source.
Remember window size & position
It determines whether or not to remember the window size and position.
If checked, it will open window in that size at that position next time. If unchecked, it will open the window by system default.