Here is how to start a very simple layout.
This text is in English, maybe somebody can translate...
- Open CATrain, it will be in "drawaing" mode.
- Draw a simple network (e.g. an oval).
- Cut the oval in 3 blocks by inserting 3 signals operating in the same traffic direction way.
- Select menu "Mode->Edit Signals ?"
- CATrain will ask: "Do you want to assign automatically the missing labels?"
- Answer by clicking "YES"
- Select menu "Trains-> place a train on the railway", choose a train (e.g. train 3 "lolo"

.
- Set the train on the track IN THE PROPER DIRECTION for the signals.
- The train throttle control will pop in the right bottom corner.
- Set the speed button to max speed. THE CURSOR WILL NOT STAY WHERE YOU MOVE IT but this is normal, the power is still OFF.
- Repeat the same operations to place a second train?
- Set "Power" ON.
- CATrain asks "Do you want semi-automatic circulation?" -> answer YES
That?s it , the trains will start circulating...
Next you can enjoy more complex layouts!