@Prog: Additional API is set to Technisat. Also tried "Auto [Technisat]". No effect. :?

Btw: Here is my DiseqcTree.ini
[Main]
TunerCount=1
Mode=255
[Tuner]
ID=4
[Tuner_0]
ID=5
CableTransponderList=
Caption={BDA} TechniSat BDA Digital Tuner
DevID=8C18D8A0026264610064657669ED
[Tuner_0_0]
ID=2 ...

Similar problem here. Got a simple DiSEqC 2.0 Switch to choose between 19.2 E and 28.2 E. Hardware is working fine , since both satellites can be scanned and tuned using the dvbutils on Linux.

However, no success using ProgDVB. It doesn't matter which setting I use (Simple, DiSEqC 1.0, DiSEqC 1.1 ...

ProgDVB 6.05.01 minor bug:
Right-Clicking on the system tray icon, then chosing "Exit" has no effect.

Shouldn't be too much work to fix this.