Multiple instances created of gtn_simulator

[ppppp]

Hi,
sometimes multiple Instances of gtn_simulator.exe are being started.
SOmetimes 2, sometimes three instance.
Also Audio for example is doubled in this case, with three instances GUI becomes flickering (seems to be fed by each instance, similar to sound doubling).
I have this since 1.0.3, but not sure since I own the gtn only short time (at least never happened with 1.0.2 before)

Thanks!