I don't know why? but, winstep nexus free version doesn't auto hide on Newgen(metro UI software from raymonvisual)and then doesn't appear but it's still active. When I click Newgen, winstep nexus doesn't appear but when, I click taskbar, winstep nnexus can appear.
What's happen? it's all about hook? or because Newgen doesn't integrated with explorer.exe?

Please, help me.

My guess is that you'll have to bring this up with Newgen's author, sorry.

Have him contact me at the Winstep support address if he needs to.

Never mind,

because now, I use Rainmeter with Omnimo skin then I disbabled background to not cover desktop and it's work. After desktop is showed and there's no background that cover desktop, I can use Winstep Nexus normally again.

my desktop is Omnimo and my taskbar is Winstep Nexus.
Both are Epic Awesome