Render queue has stopped working

lamoid_5f20d3e469

Since I upgraded to DS 14.15.0.2 , Render queue has stopped working. Apparently it can no longer open Studio to start the next render. I unintalled RQ then went to the daz website, downloaded then installed 

59787_RenderQueueforDAZStudio45Win64bit_2.0.0_ds.exe

Tried Again. Still does not work. Here are the relevant lines from "C:\Users\xxxxxxxx\AppData\Roaming\DAZ 3D\Studio4\log.txt"

2021-03-05 06:30:30.109 RenderQueue: Entering  restartDazStudioOrThrow(): restart mode is 1
2021-03-05 06:30:30.109 RenderQueue:   calling dzApp->quit()
2021-03-05 06:30:30.109 RenderQueue:   spawning stock restart script
2021-03-05 06:30:30.109 RenderQueue:     creating restart batch file
2021-03-05 06:30:30.121 RenderQueue:     batch file is “C:\Users\xxxxxxxx\AppData\Local\Temp\mfrq-restart.bat”
2021-03-05 06:30:30.145 RenderQueue:     ShellExecute() returned HINSTANCE 42
2021-03-05 06:30:30.145 RenderQueue:     GetLastError() reported: 0
2021-03-05 06:30:30.145 RenderQueue: Leaving  restartDazStudioOrThrow(): restart mode is 1

That is, the Render Queue script closes DS successfully then repeatedly tries to restart DS (31 times in my latest attempt) and then gives up.  If I manually start DS, Render Queue comes to life as if it had restarted it, and does the next render.

I have come to rely on this program. Do you know why it is failing? How can I make it work again?