Hello Alex,
Could you make sure that the file is placed in both folders:
C:\Program Files (x86)\Common Files\Bentley Shared\Plant V8i
C:\Program Files (x86)\Bentley\Plant V8i\Bin\R18
Please check version of the files to make sure that version is 8.11.9.143.
As well just in case, to make sure this is not project specific issue, please test isogen generation or pcf export using advanced selection in new project.
Regards,
Artiom