First; lets uninstall the SWB Audio Capture driver.
- Start the app
- Go to the app menu, and if enabled, choose "Uninstall SWB Audio Capture"
- Quit the app
If you have already unstalled the app, see: Uninstalling SWB Audio Capture
Delete the following app folders & App
- /Users/<you>/Library/Application Support/iShowU Instant
- Finally, delete the app from /Applications (move to Trash)