I believe this is the culprit 

//SaveConfig(config);

Changed that to SaveConfig(config); and it makes the file now

However if I make changes to the config, now that it is actually making one, and reload the plugin it wipes out my changes :)

So I also had to remove the LoadDefaultConfig() line from the private void Loadvariables() section... Hope this helps 

Odd.
I had taken that out to allow loading default then overwritting it to add new items cleanly.  I will have to tweak logic a bit.

Thanks for pointing that out.  I will work on a fix.

Merged post

This is fixed but broke the saving of the config.  I will put of a fix for the fix shortly.

Merged post

Can you set this to fix if you are happy with the latest version please?