When trying to use the SQL Tuning icon it appears with the message: SQL Optimizer module 5.6 is required for this functionality.
Install ToadSQLTuning.exe and re-run the server side objects wizard.
RESOLUTION 2 for versions 9.7 and above:
Please run the installation file again and see if there is an option to install SQL Optimizer.
RESOLUTION 3 for versions 9.7 and above:
Uninstall Toad and Optimizer:
1. Select Start | All Programs | Quest Software | Quest Installer
2. Run Quest Installer to uninstall products
3. Run the installation program of Toad to reinstall Toad and Optimizer