Dev's original split block tutorial (not being an experienced imgur user, i'm not sure if he can (or will) delete his uploaded images so I've copied them)
Go to options, and select "display coin control", press apply/ok
Go to your send coins panel
Click on inputs, select input (can be one, or more), and copy your address, click ok
Select splitblock, enter nr of block inputs you want, enter your address, and enter amount "after fee", click send and done.
Result
Currently the sending fee is set to 0.1 NUC. So if you don't want high fees, you can manually split your coins with single transactions. Just send coins to your own address the normal way.