I uninstalled the Amazon Drive on Windows 10, it left a ‘Amazon Drive’ folder in the navigation of File Explorer.

Amazon Drive

To remove this:

Always backup the registry before editing

Press Win + R, to open Run Dialog

Type regedit

Click View Menu and select Address Bar

Amazon Drive Registry

Paste the following into the address bar:

Computer\HKEY_CLASSES_ROOT\CLSID\{9B57F475-CCB0-4C85-88A9-2AA9A6C0809A}

Press enter to search

Amazon Drive Search

Double click the System.IsPinnedToNameSpaceTree, edit the value to 0

The Amazon Drive should then disappear.