KangarooPhysics error

Hi David,

I am having a problem with KangarooPhysics plug-in, after typing grasshopper in the command bar this error message appears. 

Object: KangarooA (level 1)

{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: KangarooA (level 2)
{
Could not load file or assembly 'KangarooLib, Version=0.0.8.5, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
FileNotFoundException
}

I appreciate any help regarding

Thank you