v1.3.2.0.
CPU usage has stablized now, but it still happens occasionally. Weird. I hope a next update sovles this.
BTW:
Someone is accumulating Opal's @ Bittrex

Hi PhilipMorris,
Let us know if you still have this CPU load.
And if it happens again, please reply to these questions:
-Does it happens when you close the Opalcoin Client ?
-What type of W8 do you use ?
-What kind of CPU do you use ?
-What are your C++ runtime Libraries (In Program and features: Microsoft Visual C++ 20
XX Redistribuable.... )
-Are you testing/using Opal Drive when the Opalcoin Client is crashing ?