Only one standalone soft synth can be triggered at a time?

[Jelnet]

Hi all

If I open, say, Pigments soft synth in standalone mode and then open EW Play Piano, then the Keystep will only play Pigments. If I want to use the Keystep with EW Play Piano, I first have to untick it in the Midi settings of Pigments, then go back to EW, untick it, tick it again, then press Apply. I have to do the same if I want to go back to Pigments. This is a right pain.

My Korg KX8 works fine, will happily play both synths at once. Is there a setting in the Keystep to make it work right?

Thanks!

P.S. I am on Windows 10