The most important settings are:

1. The indication that the program must load the last opened project when it is started.
2. Size of the visible part for long strings (60 characters by default).
3. Log level: default, full or disabled.
4. SQL statements delimiter. You can select it from list or enter manually.
5. "Show different only" allows you to see only different records during compare or synchronization. This option can save a bit of memory for large tables compare.
6. "Delete from secondary" disabling this option will block deleting a record from the secondary table even if there is no such record in the primary table.
7. "Insert by primary" disabling this option will block adding records from the primary table even if there are no such records in the secondary table.
8. "Update secondary" disabling this option will block updating an existing records in the secondary table.