Hi Vinod,
To see the previously saved designs, you can go to "Use a specific design" feature at top left of the webinterface/process design screen.
It is lined up with the save buttons, click on the "Alarm Clock"" icon to see the list of saves you made so far.
Click on "Preview" arrow to see the saved version and "Revert" arrow to replace current version with old/saved version.
Hope this helps.
Regards,
Murali
Fujitsu RunMyProcess Support