How to change db hostname for ThingworFlow after installation

Hello all,

Do I have a chance to change db connector (only hostname) after ThingworxFlow installation? I followed the below articles but one of them is only supporting change password, another one is deployment support. 

I don't want to redeploy TWFlow, I backed-up one PostgreSQL and restored another one. So, I just need to change hostname of PostgreSQL. 

The weird issue is that I don't have runtime logs under /.pm2 folder 

Thanks,

Ref-1: https://support.ptc.com/help/thingworx/platform/r9/en/index.html#page/ThingWorx%2FHelp%2FIntegration_Orchestration%2FPasswordFlowAdminUser.html%23

Ref-2: 

https://support.ptc.com/help/thingworx/platform/r9/en/index.html#page/ThingWorx%2FHelp%2FIntegration_Orchestration%2FReconfigureThingWorxFlowSetupParameters.html%23