The patch won't fix data that's already been imported. From the patch page:
- iPoker format change on April 9. You will need to purge and re-import all hands played since the 9th of April to fix your data.
1. Use the Utilities > Database Maintenance and Options window to purge all your
iPoker sessions that were played on April 9, 2008 and greater.
2. Then reimport the XML hand history files. If you use the option of the auto-import window to have PTO move the processed files to another folder then go to that folder and copy the files back to the iPoker hand history folder then use the Force Import button on the iPoker auto-import window to get PTO to reimport the files.