Carsten, OZ9AAR added many new features. The best in this release is:

When a station with "/" in the callsign (/P, /R etc) is called, UHM will retry a number of times to get "DX heard me" status (if the DX is using UHM). This helps when the DX/Rover has bad internet connection. Terminal will retry 4 times with 5 seconds delay to get an answer. This means that it can take more than 20 seconds before you get a UHM confirmation on a "/P" etc station ! If the DX has good internet, the confirmation will happen instantly (after the delay configured in "UHM settings"), if internet is not optimal, it will allow 20 seconds delays from the DX to the UHM server.

The latest versions can be downloaded on his Website.