Can't unpin tile from Start Menu

I have a stuck/corrupted tile on the start menu and can't remove it. Only right-click options available are Unpin and Resize, but Unpin does nothing.
It was pointing to a shortcut file I placed manually on the ProgramData's Start Menu folder, but after messing with it by moving, pinning and unpinning, the tile started behaving that way, and doesn't even show the respective shortcut icon anymore (or even launch it, for that matter). I can create a new perfectly working copy of that tile from the original file, but creating or removing it won't affect the previously messed one.
So, is there any other way to manually access Start Menu tiles, so I can remove it?
Thanks

 

It's an updated 10240 RTM.

 

I'm also looking for a way to simply delete current or restore original OOBE Start Menu items, but it seems that W10 isn't storing preferences on the same files as it used to on earlier preview builds. That would help with this problem too.

 

Thanks, but I've already tried that approach. Current tiles don't seem to be stored on registry, there must be a db on a file elsewhere as it was in the early previews (%LocalAppData%\Microsoft\Windows\appsFolder.itemdata-ms).

 

Also, sfc /scannow did nothing to correct it.

Well, I've solved it in a less than optimal way, as nothing was learned with the process. Installing Stardock Start10 trial deleted the faulty tile immediately, without needing any further action taken. After removing Start10, the tile didn't come up again.

Thanks to all that posted. If anyone finds a way to manipulate or reset Start Menu tiles, please update this thread.

 

No, I'm not using Kaspersky. Thanks.
The problem started when I put a shortcut directly in the ProgramData Start Menu folder, but it wasn't appearing in the All Apps list. But it still appeared in the new items list, so I right clicked it to pin. Then, the tile was non functional, had no icon, and couldn't be removed.