First of all, make sure that you have downloaded launcher application for MMO. After this you will need to log into your account.
Once you will log in, you will be able to proceed the installation of the game.
Simply click "Install" and select the installation folder. Please note that there could be more drive space required due to regular game updates.
Click "Install" on the pop-up window and the game will start downloading.
After the installation the PLAY button will be highlighted and you will be able to join the world of Life is Feudal: MMO and create your first character.