On a very few computers users have reported that after upgrading their job data is missing.  It's not missing, it just wasn't imported.  If your data was not imported upon upgrading do the following:

Select Reset Blinkbid... under the File menu.

In the resulting dialog box select Restore From Your Previous Version.

Your new copy of Blinkbid will import the data.  As to the reason that this in very rare circumstances doesn't happen automatically, we believe it has something to do with permissions on older systems.  That said Blinkbid is very careful about data safety.  Every time you quit Blinkbid your data is backed up twice.  Each version of Blinkbid has its own back up file. You can read more about backup on the data safety section.