TWF files associated with TDP and not TW?

When double-clicking a saved Toad Workbook file (.TWF), its opening in Toad Data Point instead of Toad Workbook. Any idea how to change this? It's only happening with 1 user.
Thanks!
Eric

Hi - If you are using version 6.4 it should open in workbook. what version are you using?

User is running v 6.4