Try creating a new <user>.docking.xml file.
1. This file will be located in the same folder as your User Preference File (UPF). To locate, go to: Workspace > Configuration > MS_USERPREF. The file will be at the location defined for this variable.
2. With MicroStation closed, delete the file.
3. Open MicroStation.
Don't use the User Preference File (UPF) from MicroStation V8 2004 in the new installation.
Try creating a new UPF.
See also: The User Preference File [UPF]