I did re-install drivers as well as other software (including T2), but quite sure that it was the com port driver issue.
By the way, I have still not been able to get the default parameters to upload - the final step in your conversion document. The unit is however functional and if necessary, I will manually adjust where neccessary.
We have now upgraded to the paid version of T2 and are going through the learning curve of figuring out what settings work best with the Banggood 2.5W A3 laser!
Thanks of all the help.