When you uninstall the Evergreen staff client code from your system, the staff client preferences and cached data are not removed from your system. This can be a problem if, for example, you have registered your workstation with the wrong library; or if you have chosen a display language (locale) that is broken and will not let you start up the client again
On Windows, you can uninstall the Evergreen staff client code using the Add/Remove Programs menu.
To remove the staff client preferences and cached data entirely on Windows, there are two directories that you must delete completely (where <profile> represents your user profile name):
You might need to change the preferences in Windows Explorer to display hidden files (Tools → Folder Options… → View).