Phillipa - If your file still has its workflow history, you can view the workflow in a DataManager tab by adding one from:
Tabs > New > DataManager
You can also add a DataManager view into an existing tab by selecting:
Add view > DataManager
All DataManager tabs in a given file show the same workflow, so you should not need more than one.
If a previously-populated DataManager tab comes up blank, it means that the IOK file has been saved without its history....and cannot be refreshed. In this case, you need to find a copy of the master IOK which still has the history, and can still be refreshed.