If for some reason your session has samplers that can't find their samples, you can relink them by following these steps:
If the broken links are just in one set of your session, you can right-click the set and choose
Repair samples. If there are multiple sets with broken links, you can choose to repair links for the entire session by selecting
Repair samples from the "Edit" menu.
Next, you will be presented with a dialog that will allow you to choose the folder where your samples are located. Once you have selected the folder, click
Apply and the samples will be relinked.