备份Messenger的数据库和Player的Chainmail数据
Upgrade process in Cnario is quite simple, uninstall old version and then install new version, as long as you have back up from your DB and tree.dat file you are safe to roll out upgrade.卸载旧版安装新版Player
After you backup all necessary information, you can uninstall the player application and install the new player version 3.8.1.156系统内多Player版本升级
Basically when needed to upgrade big amount of players we can provide upgrade patch that you can send from Messenger to the players, this patch will be executed automatically in the player side, upgrade the player and then run playback again.升级Messenger
As for the Messenger, you need to uninstall Server and then Messenger and then install the new version according to the same steps you have in the installation manual I sent you yesterday.
提醒
In General, when upgrading system, it is prefered to work with the same version in Messenger and players for full compatibility