I'm currently having a problem where pinning any kind of shortcut to the taskbar via its context menu doesn't do anything. That is, a pin doesn't appear on the taskbar, and in the location '%AppData%\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar' no shortcut file is created.

I recently upgraded to Windows 10 Professional from Windows 7 Professional. That may be the cause.
Another potential factor is that previously, I have followed this guide (using both methods described) in order to further customize my system. The reason I mention that is because in researching I read the answer posted here. Unfortunately, I have not been able to fix the problem by undoing the first method of that guide; also there is no way to undo the second method of that guide, and I have been unsuccessful in fixing the problem by following the solution that answer describes (I couldn't find the 'Inkfile' folder). By the way, is it wrong that the 'link' key I deleted in following the process to undo the first method hasn't reappeared after restarting?

I'm not sure what to try next.
I would really appreciate some help... sorry to be foolish enough to try and customize my system a bit, if that is what caused this issue.
For now, I guess I'll have to use shortcut toolbars on my taskbar. Or is there a registry location where I can at least go in and, say, add a key with a shortcut address and icon address to add a pin with those properties?

Thanks in advance,