Hi,
Please disable Data Execution prevention (KM1220841), User Account Control (KM00598473) and antivirus or hooking software running on your machine as they may prevent the proper work of VuGen.
As your installation of LoadRunner is 11.0x you can also try the suggestions in the following document:
Virtual User Generator (Vugen) hangs on startup
Please also review: VuGen hangs when trying to use the "Open Script" button
Supported by BPM 9.13 version of Vugen is 11.03 and I would suggest you to downgrade to this version.
The full BPM – VuGen Compatibility matrix is available on page 14 of the Business Process Monitor 9.23 Administration Guide. Link to it is available in the following Post: LR-Support-Tip BPM 9.23 now supports VuGen 11.52
Kind regards,