How to change VST MiDi instrument in HalioSonic 7

I updated my Cubase to 13Pro and I can’t find out how to change VST midi instrument in HalioSonic 7.
When I open HalioSonic midi edit from Cubase routing I can’t figure out how to change midi instrument.

I don’t really understand your problem. You want to change the instrument in slot 1 ? You just select a module on the right (eg Skylab or whatever) and double click on the Preset.