Changing Default Simulator from APS to Spectre

Hi

I'm looking for a way to change the default simulator from APS to Spectre:

The dialog is from the ADE L environment (I know this is obsolete, but that's what we're still using for now), menu "setup -> High Performance Simulation". That's in Virtuoso IC6.1.8-64b.500.29.

Thanks very much for your input!