Hi Maya,

I've opened an issue to track this, we should move the files associated with a folder on rename this is done when the site wide file root is changed but apparently not for individual folders.

As a workaround, something you could try is to manually copy the old files to the new folder location. Each folder on the LabKey server has a corresponding @files subdirectory on the file system that stores files referenced by a file web part. If you can find the original @files subdirectory and copy it to the new location, you should be able to restore your files in the webparts.

You can get the location in the file system that corresponds to a project by navigating to : manage project->project settings and then viewing the files tab. The path of the file root in the text box should indicate where on the file system the files are stored. A subfolder to a project will just have a corresponding subdirectory in the file system with its own @files subdirectory.