Runes of Magic US / AU

If you want to save your addons and screenies, copy the \Interface\Addons folder and the \Screenshots folder to a safe place before uninstalling the game you have and doing the slim client installation.

You'll find those folders in the main Runes of Magic game folder under Program Files or Program Files (x86).

I'm experiencing some sort of processing lag too. It's random, sometimes I get somewhere and there's no need to have a lot of graphic movement, then screen starts to show in frames. All started since the last three updates. So the question here is, is there some kind of defrag for the game folder. When I played Ragnarok we had a GRFdefrag tool.

A regular HDD defrag should be enough, presuming that you aren't already using one.