Thanks for your reply, Phil. But to be honest, I’m a bit at a loss. I’m worrying that I didn’t succeed to put my problem across.

I choose SAMPLETANK as my default vst synth and it works. I can hear all ST sounds by setting the right midi channels.
Then I want to add a second and third vst:
REALSTRAT plus AMPLITUBE 3 for the guitar section vst.
For the string section I add KONTAKT or MINIMOOG V.

Then I would like try out the sounds in styles and songs to see what matches up.
I can do this while changing the styles.
But as soon as I load a new song, my second and third vst have disappeared.
I want all three vsts together as a standard.

Maybe I didn’t understand the vst integration enough or my preference settings are insufficient.
If so, I would like to learn from my faults.

Thanks

Willi