Hello Furry,
thx for your quick answer.

I am using the Rev. B of the DWA 131 and the driver is this: http://support.dlink.com/ProductInfo.aspx?m=DWA-131 The 2.3.2 Driver for Mac 04/09/15
Os X 10.10.5 has officially released yesterday and you should have an Update Sign on your App Store Symbol.
Not sure what you mean with Mfr!?
The router is from an Cable TV/Internet/Telephone Box that might not been used in the US.
I am not sure what you mean with Wireless modes ? If you mean if i use 2.4 or 5 GHz. I cant see it. Might be 2.4 GhZ and There is no other WLAN that uses the same channel.
I wanted to plug my Wireless Adapter into an external "plugin Box" , but my macbook pro do not notice it if it is not directly on the USB of the macbook