In macOS Sierra, the Tunnelblick icon is not placed near the Spotlight icon. Instead, macOS puts it to the left of all the other icons in the status bar that were active at the time Tunnelblick was launched. (The status bar is the right side of the menu bar.)
I think the problem you are having is that the icon is not where you expect it. And if you have many status bar icons (using iStat Menus, for example), the left-most ones may be hidden by the menu of whatever application is active. In that case, to expose as many as possible, click on Finder or some other application that has a small menu bar.
macOS Sierra lets you move the icons around, so you can easily move the Tunnelblick icon to be near the Spotlight icon if you wish: just hold down the Command key and click and drag the icon where you want it.
If that's not the problem – the Tunnelblick icon really isn't in the status bar at all, please post a screenshot of the full menu bar.
It's unlikely that reinstalling Tunnelblick would help because this isn't the type of problem that would usually be affected by a reinstallation. But to answer your question, the way to completely remove Tunnelblick from your system is to follow the instructions at
Uninstalling Tunnelblick.