Topic: TotalMix FX 1.50(3) White Window Solution
For anyone experiencing this, it took me a bit of messing around to solve it but the solution is very simple.
Windows 10 (latest)
nVidia GF760 (latest)
I was finding that bring up the TotalMix window brought the window up but it was completely white. I could however, access the menu.
After searching around, checking drivers etc. I found that simple disabling Direct 2D in TotalMix FX solved it.
Hope this may help anyone who has this issue.