Error message :
"Error while running the on_configuration_changed:wirelessNetworks/control.lua.31:attempt to concenate field "old_version"(a nil value)"

I'm also seeing this. This happens when loading an existing game, one that was not created using this mod.

If you make the following changes, the mod loads fine. Open up control.lua, and change DEBUG = true to DEBUG = false.

Sorry about that. I shall try to be more rigorous in my testing in future.

Wow, that was fast, thank you.
OK, working, no problem so far.