Plug-in Windows Blank

Hi all,



I upgraded from PT10 to 11 a while back, and since then a lot of the stock plugins have their windows blank. This is the same both in 11 and 10. They work fine, and I can change most of the parameters, it's just the graphic is missing:









Anyone know how to sort this?





Thanks.









i7-2600 @3.40ghz

16GB Ram

Windows 7 64bit

PT11.1.2