Should it be relevant in future, there are a few ways to reset all settings to default:
In a scenario where you do have access to the GUI, the "Reset Defaults" button on the "General" tab of the VoiceAttack options window can of course be used.
Should you not have access to the GUI, hold the Shift and Ctrl keys on your keyboard while VoiceAttack is starting (you may need to have them released to be able to launch it; hold them down as quickly as possible right after clicking "Launch", or double-clicking a desktop shortcut), and on the "VoiceAttack Load Options" window check the "Reset VoiceAttack settings to initial values (does not affect profiles or registration)" option, then click "OK"
VoiceAttack can instead be launched with the "-loadoptions" command line parameter, without needing to hold down keys, to open the same window.
Alternatively, you can delete the configuration file, "user.config", located in a subdirectory of
%localappdata%\VoiceAttack.com
(you may have more than one subdirectory, if you've installed VoiceAttack to multiple locations in the past)
You can hold the Windows key on your keyboard, then press the R key, to open the "Run" dialog, paste into the "Open:" field what's in the code block above, and click "OK", to open the mentioned directory.
For the Steam version this will mean VoiceAttack will require Steam to run in order to verify your license information (if you're launching VoiceAttack through Steam anyway, this shouldn't be noticeable)
Profiles are not stored as part of the normal settings, so they would be unaffected provided you follow the instructions above.
An aside to this is that you can back up your configuration using the "Export Settings" button on the "System / Advanced" tab of the VoiceAttack options window.
It is also worth pressing F1 while VoiceAttack has focus to open VoiceAttackHelp.pdf in your default PDF viewer, which contains information on VoiceAttack's features.
Enjoy using VoiceAttack