Online Documentation for SQL Manager for SQL server
Overwriting existing output file
If a file having the same name as specified for an output file generated by SQL Manager already exists, a warning dialog is displayed.
You can Overwrite the file, Make it Unique, or Cancel both and change the path or file name manually.
The application makes the file unique by adding the current timestamp to the specified file name if the Add Timestamp to filename option is enabled, or by adding a simple numeric postfix to the file name if this option is disabled.