We are using AEM Forms 6.5.4 and we are trying to use PDF Generator Service API for converting PDF to MS Word document. We are referring to  to achieve this conversion . While executing method exportPDF2() we are getting error as  .  doesn't talk about the parameter - settingsFile which is provided to exportPDF2() and do not provide any example on how to generate this file .
Exception : ALC-PDG-080-023-Acrobat_PATH environment variable either not set or is invalid. Please set this variable to point to Acrobat.exe in Acrobat version 11. Acrobat_PATH should be set to <Acrobat_Home>\Acrobat 11.0\Acrobat\Acrobat.exe. Here <Acrobat_Home> is the parent folder where the Acrobat is installed.