The information is saved in the PRO.DLP file. By default, this is located in the directory C:\ProgramData\Dlubal\Global\Project Manager. You can check the directory path of Project Manager in the "Program Options" dialog box. This can be accessed through the Project Manager menu Edit → Program Options (Image 01).
If the project folders are moved to another drive, all links must be updated in Project Manager. Alternatively, you can make the changes directly in the PRO.DLP file. To do this, open it in an editor and change the directory paths using the "Find and Replace" function. For example, if the directories of drive C: on drive D: shifted, C is: with D: to replace (Image 02). This is also shown in the video.