Generally speaking, reloading documents using QVS/Publisher is more robust than doing it in a bat file, so I'd highly recommend switching to the server instead.
The issue, however, is purely a licensing issue. When you reload using QVS, you are using the QVS license, and nothing else is needed. When you are reloading in a bat file, you are using QlikView Desktop (Developer) tool,which requires a license to run. In order to make it completely painles, you'd need to purchase another local license (it's the same price as a single Named User CAL) and apply it once and forever (that's the option 2 that you got). If you keep leasing license from the server, you'll have to tinker with it once in a while...
There is a way to do the same thing using the QVS, but it requires a VBScript macro to be executed, as a replacement for the bat file. Someone posted a macro like that on the forum, try looking it up.
