The illustration below highlights the area to access the dropdown menu, which displays all the runtime folders in your Library. 

                                                                                                         

You may have observed that my Poser Library contains numerous runtime folders, each with distinct contents and figures. These runtime folders are organized within uniquely named folders, as illustrated above. Conversely, you've been saving files indiscriminately in a default Poser folder. Such disorganization can result in the loss of content in your Library.  Attempting to reorganize the library at this stage will likely lead to the textures becoming disassociated from the models.