This is what happens when I open the mb-core:

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loading './Vadi_System_Sylvan_Normal0_Version.dll'
Failed to load './Vadi_System_Sylvan_Normal0_Version.dll'
loading './vadi_mapper.dll'
Failed to load './vadi_mapper.dll'
loading './vadi_stormhammer_targetting.dll'
Failed to load './vadi_stormhammer_targetting.dll'
loading './vadi_knight_limbcounter.dll'
Failed to load './vadi_knight_limbcounter.dll'
loading './vadi_harvester.dll'
loading './vadi_refiller.dll'
Everything's loaded - ready to play!

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And this is how the config file looks, under the modules section:

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# Modules to be loaded. This is the place to add addons to.

dll "./Vadi_System_Sylvan_Normal0_Version.dll"
dll "./vadi_mapper.dll"
dll "./vadi_stormhammer_targetting.dll"
dll "./vadi_knight_limbcounter.dll"
dll "./vadi_harvester.dll"
dll "./vadi_refiller.dll"

# End of file.

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All the .dll files match up to what's in the system folder.