Design Space Explorer - *** Fatal Error: Access Violation at 0X000000001E19EB30

I've used this Virtual PC many times in the past to run DSE, however, after about 1 year and re-trying to launch DSE Quartus crashes immidiately with the following error: 

Summarized as follows:  full report attached below.

Quartus Prime Problem Report

Executable: quartus_dsew.exe Edition: Standard Edition Version: 18.1.1

Build: 646 Address bits: 64 Platform: Windows 10 64-bit VM:

Error: *** Fatal Error: Access Violation at 0X000000001E19EB30 Module:
quartus_dsew.exe

Stack Trace (truncated for readability):

PyModule_GetNameObject (python36)
_PyCFunction_FastCallDict (python36)
_Py_CheckFunctionResult (python36)
_PyEval_EvalFrameDefault (python36)
PyArg_UnpackTuple (python36)
PyImport_ImportModuleLevelObject (python36)
PyEval_EvalCode (python36)
PyCFunction_Call (python36)
_PyFunction_FastCallDict (python36)
_PyObject_FastCallDict (python36)
_PyObject_CallMethodIdObjArgs (python36)

Full stack trace available in original Quartus crash dialog.