Just a little warning if you have an intention to update to the latest 1.4 version.
If you use the function convert to DNG at import it doesn't work in this new release. Problem with the export is also reported. It's now an "official" bug and will be corrected in the next update.
Reports about users have problems updating their xmp files as well.
So if you don't desperately need this new update my advice is that you completely skip this update.
UPDATE: Only the Windows version is affected. MAC version seem to be fine so far.