This patch fixes many bugs found in the full release of Lost Archives. Online play will be far more stable after this patch is applied, and you must apply this patch if you want to use the public matchmaking feature. To apply the patch, simply extract the contents of the .zip file to whereever you extracted the full version of Lost Archives. You will be asked if you want to overwrite the file, choose "Yes". If you're not asked to overwrite a file, be sure that you're extracting the patch into the correct folder.