Looking for lost mod.

Hi, my problem is that after reinstalling Empire I realised I did not have the files for my original set of favourite mods - this led to my search for one in particular. I downloaded and installed the ones I needed again, only to realise that there was still a big difference to the gameplay in this version of Empire I had to that of my previous one - the prices of the trade items (eg. Cotton) in the "World Market" were now cheaper. Previously the more expensive ones had been around 130, but were now around 13. This effects gameplay massively as you can guess. I would like to know if this is becuase of a missing mod, update (if so which) etc. or just a glitch (it is still there after a reboot and change of faction etc).
Thanks