It can happen due to the organizing files/folders with the pictures that they will be ranamed/moved - how to check in GenoPro whether all the links are valid (see MS FrontPage as a good example of checking links). Maybe I missed something. The only way I found now is to open pictures list window and to check each of the pictures manually .
If not - then this is an important function and it belongs to the "Suggestions, Wish List and Feature Requests" section.