How can I reset the dialog windows in PTV Vissim to their default sizes and positions?

1) Choose Edit > User Preferences.
The User Preferences window opens.
2) Choose the entry GUI > General.
3) Click the button of your choice:
Reset Menu/Toolbar/Shortcuts
Reset dialog positions
A message opens confirming the reset. The next time you start PTV Vissim, the respective interface elements are displayed with their default settings and in their default positions.