This can be used to update the image paths of those tables. So if for the old path you put C:\oldfolder\ and the new path you put C:\newfolder it will go through all the records, find any that have the older folder name, and change it to the new folder. The convert will not move the actual files; it only changes the paths in the database.

It's suggested to run the convert with the Log Changes Checked and also ensure that there is a backup of the folder before it has been converted in case for some reason you need to restore the back up.