>Is it possible with the new Navigator to import all the messages I've saved in my old categories versions... I have all these messages I've kept in a directory and I can't read them anymore unless I use older versions of the Navigator !!
No, it isn't.
However, this was also one reason to release 2.0 in order to let users manage the data in any way they want. So, as the data is available, before upgrading to a new version, you will be able to just copy the table or import the data in the new one.
It was planned at first to release an option to synchronize the folders with the online interface. We would have had to do that in both ways. Synchronization problems were also applicable. Also, as for the arrival of XML and other technologies, UTNav primary focus will remain the reading of unread messages as the evolving of UT online interface will remain. So, we didn't want to push UTNav it too far. There is too much online that we wouldn't have been able to do on UTNav.
We received several feedback so far about users who confirmed us that they can manipulate the data externally for their own use. By doing the same, you'll be able to keep your folders.