After upgrading from Vista to Windows 7, I find that I cannot Pin the application "Shiretoko (64-bit)" to the taskbar without it getting a label of "Shiretoko (64-bit) (2)". I don't have any other icons on my taskbar with a similar name. I've tried unpinning it and re-pinning it. I've uninstalled and reinstalled Shiretoko (with a restart in between), but the pinned icon name always gets the (2) appended.
I can pin "Shiretoko (Safe Mode) (64-bit)" and it pins without the (2), so the problem seems to be unique to the normal-mode icon.
How can I fix this situation? It's only a minor annoyance, but I don't see how I can correct it. Where is the configuration for these pinned icons stored?
Edit: If I try to edit the properties for the pinned shortcut and rename it to the desired name, it gets renamed with a (3) appended, indicating that there must be something using the desired name.