The only difference between these two products is that they use different source data, as follows:
· DataNumen Outlook Repair(DOLKR) takes a corrupt or damaged PST file as the source data.
· DataNumen Exchange Recovery(DEXR) takes a corrupt or damaged OST file as the source data.
So if you have a corrupt or damaged PST file in hand, then you can use DOLKR to repair the file and recover the emails inside the PST file. If you have an OST file instead, then you should use DEXR to do the task instead.