Problem Sorted. Not sure of the exact reason for this, but a combo of actions.
Went back to Asio Driver from WDM (though Asio did not work earlier.
Sample rate 48k and Bit Depth 24
Now I am certain I had already tried these settings as a switch between 48 and 96 / 24 bit and have done so in previous versions always with not issue. (I have used 44.1 also)
I went to do a reinstall in TTS1 so started the install process of X2 but aborted the bin extraction process just as it was starting because I did not want to spend the time at that moment.
Went back into app and reset the driver to Asio and the above settings were already set.
And hey presto.
Hmmm! Not sure what happened there.
Anyway before I jump up and down for happiness I will be testing through the day a little, to make sure it is stable.
I will try the other DXi synths.
thank you everyone for your input.