It seems that the current config is broken with respects to smelting, rocket part manufacturing, and Extraplanetary Launchpads. Specifically, there are no buttons showing up for smelt or any of the other "manufacturing" functions when parts are clicked.
This is with KPBS 1.4.2 running on a Mac under KSP build 1622, with current KIS, KAS, and EL from project GitHub releases.
Having never had the mods working the past with EL, I can't say for sure what I am supposed to be seeing, but with power, engineers, workshop, etc. all in place, the smelter does nothing with metal ore and it all goes downhill from there. All other KPBS functions seem OK (open/close base parts, etc.) so it seems to be borked with the EL functions only. But right-clicking on modules just shows resource levels with no other buttons or controls showing.
Is this a known problem with a work-around? Happy to help debug if not.