VERIFIED SOLUTION i
After upgrading to Spectrum 8 SP1 the customer was unable to access the options of the PointInPolygon stage via the Enterprise Designer. When they tried this they received an "Object reference not set to an instance of an object" error as shown below:
The problem is specific to x64 bit machines only. When installing/upgrading to Spectrum 8 SP1 the x64 bit version of the Microsoft C++ 2010 Distributable is installed whilst Spectrum actually requires the x86 bit version.
ResolutionUPDATED: April 12, 2017
Install the x86 version of the Microsoft C++ 2010 Distributable.