Remove Soundflowerbed manualy
First of all you have to quit Soundflowerbed.
Make a right click on Soundflowerbed and select Quit Soundflowerbed.
Next. Go to the Applications folder and find there Soundflowerbed and move it to the Trash.
Then go to: Macintosh Hd > private > var > db > receipts
Found there all files that contain soundflowerbed in their names and delete them.
Reboot your Mac and Soundflowerbed will be uninstalled completely from your Mac.
Uninstall Soundflowerbed using App Cleaner
App Cleaner is an advanced tool for App removal that allows you to remove an app completely with all its service files in several clicks.