Uninstalling VoiceAttack does not delete the profile database, nor the settings file.
If you installed to a different location, the old settings file would not be used, however the profile database should be unless you're using a different user account.
You could have Windows search for "VoiceAttack.dat", which is the profile database file.
Looking at your settings, you have the "Audio Output Type" option on the "Audio" tab of the VoiceAttack options window set to "Legacy Audio".
The default and recommended setting is "Integrated Components"; You'll want to change it back to that.
You also have the "Override Default Playback Device" option explicitly set to your only playback device. That option does not apply to the "Say Something with Text-To-Speech" action, nor does it apply when the "Audio Output Type" option is set to anything but "Integrated Components".
That should not cause issues with text-to-speech playback, however.
After you try executing the command again after changing to "Integrated Components", if there is still no audible feedback, check the Windows volume mixer (which can be opened by holding the Alt key on your keyboard and clicking the wrench icon on VoiceAttack's main window) to make sure VoiceAttack is not muted.