Just an update. All developement on the desktop app has been at a dead stop for a long time. It still has many of its major past problems and limitations, though I haven't seen the crashes and locks that others report. I won't reiterate its limitations and misleads, as others herein have already done so.
Development has moved over to DT for Android, and now has pushed on to DTA Pro for a price. And yet there's little to no upgrade option for those of us who already paid for the Airsync or other add ons now included in DT Pro. So if we want a few of the new features in that, we end up paying for AirSync, etc. all over again.
This dev team is quickly becoming as notorious as others using GetSatisfaction forums for support, where users are tossed into a sea of others to often fend for themselves. I would suggest anything buying anything the uses the GS web system to think twice, even if the app has good ratings outside of its own site (and DT does not).
Now I'll see if MacUpdate actually takes my post since the last 4 recent ones are no longer showing up.