You shoudl be able to move those objects from one machine to another. My guess is that the location of the library has changed. To add a new Library click on the properties icon in the top right corner (Marked in red on the diagram below). This will allow you to create a new library Group and to specifiy a location.
The properties for the group are listed below:
Once the group is added you can click on the properties of that specific group using the properties icon (green circle in the 1st diagram).
The specific properties are listed below:
Make sure that the location and the rights are set correctly so you can add your own objects to your designer.
The default rights and location may have changed in the new Designer.
Paul