Are you sure you are not mixing different versions like alpha3 and alpha4 ? The error is quite strange.
I checked the versions one more time and they are equal.
Both setup use acasta69´s pyluxcoretool.exe
The only difference is that on the "Console-machine" this is executed from a Standalone download od luxcore (V2.1 lpha4) and on "Node-only machine" it's executed from a blendluxcore setup. In both cases has the origiinal *.exe file been replaced by the new one.
Yes, there is a directory with .flm and many other files, if you restart the rendering it will continue because the directory already exist.
Well, not so many files after stopping the job, propably caused by the error.
It is possible but very complicate border line impossible for an end-user. We are currently lacking an application with a GUI to perform the aforementioned operations.
What about using the "old" interface?