To avoid having to update the data source location each time, try the following:
  1. Export the data to the same file path and file name each time, overwriting the existing data file (.mdb).
  2. In Crystal Reports, go to Database > Set Data Source Location and point the report to the file from step 1.
  3. Save the report changes.
If the export file name or file path needs to be changed each time the data is exported/refreshed, the data source location in Crystal Reports will need to be updated each time. Follow the steps in How to set the location of a new database in Crystal Reports XI to update the data source location in Crystal Reports.