I solved an initial issue where the control panel locked up by in

Now I get clean guitar sounds and no presets selections make and change to the clean sound.
this is frustrating but at least its progress and but the biggest problem is the deafening hiss/feedback through my head phones as soon as I click any cabs etc.
If I select another preset the noise changes significantly in tone but still at deafening levels.
Its just like a sort of white noise.
As I said all I get at first is clean guitar sound that has no latency and is as expected from a clean setting but no presets affect the sound.
I cannot stop this unless I restart the app.
Im chomping at the bit to use this but spending literally hours and hours on google etc just to get the dang software working.
Any help would be massively appreciated