Is there a way to relocate missing images in titles? If there is a missing image in a title, Kdenlive only mentions a missing element and asks to delete it. If the image has been moved to another folder a way to search for it and update its location like missing clips would be nice.

yep, you can manually open the XML file (using notepad++ for example) and look for the path of the image (and rebuild fisically the path.. or just change path/names to new resources paths)