I have found that when using DependenciesGui.exe, the Refresh menu option and also reopening a dll does not refresh the display.

1. Drag a dll onto the window
2. Observe the dependencies
3. Make a change to the dll so there is a difference in dependencies (such as re-compile it with a different toolset)
4. Click the View->Refresh option

Expected result: I expected to see the different dependencies no showing
Actual result: The previous dependencies still show

Further more closing the tab for that dll (not closing the app)
Then dragging the dll back to the DependenciesGui.exe window, also still shows the old dependencies.

However, closing the DependenciesGui.exe application completely, and then opening the dll does then show the new expected dependencies.