Rhino Crash when try to access Light Properties

[Observer]

So, problem is when i try to change rectangular light (or any light) properties rhino crashes

Rectangular light -> object properties -> dropdownmenu -> light *crash*
"Rhinoceros stopped working...."

Only happening in Vray, rhinos own render dont crash

Any suggestions?

Windows 7 Ultimate 64bit
Rhinoceros SR8
Vray 1.05.29