Delete “WinFileCache-********.dat” in C:\Users\(username)\AppData\Roaming\Adobe\Dreamweaver CS5.5\en_US\Configuration.
If that does not work delete/rename “Configuration” folder.
Delete “WinFileCache-********.dat” in C:\Users\(username)\AppData\Roaming\Adobe\Dreamweaver CS5.5\en_US\Configuration.
If that does not work delete/rename “Configuration” folder.