Cubase working fine until I press a button

Hi guys,

I have just recently updated Windows 10, eLicenser, Cubase 9.5 to 9.5.50 and am finding that if I load up my projects then I can use them as normal but as soon as I press a button Cubase freezes and I have to close using task manager. For example with the quantize options I can scroll between 1/4 and 1/8 (with mouse wheel) but if I physically click to change then it freezes! Then on reloading Cubase I get different elicenser errors (which seem to change every time) on clicking okay Cubase then loads up and the cycle repeats! Would be so grateful on any thoughts on how to fix this.

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