For the SanDisk cruzer Titanium U3, there is a sync-software called CruzerSync which really is an OEM version of DMailer.
In the SanDisk U3 Download Central you’ll find a link to CruzerSync 6.2.042.1 which is ancient. Then I somehow found a link directly at DMailer.com, which serves CruzerSync 6.3.130.0 (which updates itself to 6.3.134.0 after startup).
Using their old versions list (where there is CruzerSync 6.3.136.0), I found out that they store their files in the form CruzerSyncV6.u3p.zip on the server. So I tried the filename CruzerSyncV7.u3p.zip and finally omitted the V7 – and there it was in the download folder: CruzerSync 7.0.142.0 for U3. (To enable the new black skin, you have to delete your sync profile inside CruzerSync.)
btw: There’s also CruzerSync 7.0.138.0 for non-U3-sticks.
The last two links are generic links which should always return the latest version of CruzerSync.