You can go to application data directory (…\\AppData\Roaming\Quest Software\Toad Data Point 4.3\KnownExceptions.xml ), delete the content of KnownExceptions.xml file. Try to launch Import Wizard again to see if there is an exception. We can do nothing for the previous version as we work fine in both TDP 4.3 and TDP 5.0. Can you download and try this in the latest Beta?