Reference voltage for ADC inside ATmega32

I have a circuit which contains processor ATmega32. I need external reference voltage 2.5 V. The behaviour in SimulIDE 0.3.12 is correct and the value from ADC corresponds to reference voltage. When I disconnect the reference voltage it is used default voltage 3.3 V. But the behaviour in SimulIDE 0.4.14 is different. I am not able to switch to external reference voltage and the reference voltage 3.3 V is used all the time.
I use the SimulIDE in openSuse 15.2.

Do you have an example at hand (circuit+firmware)?

The test file is at http://test.vranik.info/Test.simu and the hex file for the MCU is at http://test.vranik.info/main.hex. It is an ampermeter and the measured current in miliamps is displayed at the bottom left corner. When the 1 amp is set the number is "C:998" in the SimulIDE 0.3.12. This is correct. But the number is "C:776" in the SimulIDE 0.4.14. This is wrong and it corresponds to the reference voltage for ADC 3.3 V instead of 2.5 V.

Thanks, i will have a look.

Yes, you are right, it was a bug there.

Solved in 0.4.14 rev 30 and trunk rev 103.