The upgrade patch will bring both the free downloadable version and the Enhanced CD Edition of the game to version 4.5.
The version 4.5 upgrade patch must be applied on top of the previous 4.0 upgrade patch. If you have not upgraded your copy you must apply all patches in numerical order before applying the latest patch.
The version 4.5 patch is bursting at the virtual seams with content. From totally brand new content to revisions to a number of bug corrections the upgrade is packed with excitement