No Flux? Poss fix here

Well, I tried that already and do not get Flux in the right way.
Or, how is Flux supposed to be opened?
I can see it sometimes when I click the preset browser from within Halion SE. But it then shows as greyed out and when I try to highlight it, it vanishes and does not show up again.
I had indeed HSE 3 installed before. So I removed HSE & content completely and run the full installer of CB 9.5 Pro and it showed HSE & content to be reinstalled. Afterwards no difference. Flux is fluctoating…