If you wish to delete VPN app bought from the App Store, in Launchpad, hold down an app’s icon. The icon will appear to jiggle. Click the ‘x’ button to uninstall the app completely.
Keep in mind that if you don’t see the ‘x’ uninstall button, the app cannot be deleted. Usually, the apps that come with the Mac OS X are not intended to be uninstalled and therefore don’t have the option.
Also, to delete the apps, you can uninstall it by dragging the app icon to Trash (at the Dock’s end). Complete the delete action with selecting Finder -> Empty Trash.
If, for some reason, you decide to cancel the deleting of the app, go to Trash, select File -> Put Back and the app will be restored to its original spot. Otherwise, go to System Preferences -> Profile -> Delete VPN Unlimited profile by clicking ‘-’ button.
Warning: As soon as the Trash is emptied, all files and apps are removed permanently from device. It means that is you have made the files with the selected app and you have deleted it permanently, the files will fail to reopen.