Double-click on the just downloaded file mir1011b_upgrade.exe. You will se a window like the one shown here. Select Mir installation directory using "Browse" button (by default the directory is set to C:\Program Files\WEMADE Entertainment\Legend Of Mir)
Once selected installation directory click on "Unzip" button. Decompression process will then start as shown in the screenshot.
Once decompression is done, you will see this confirmation message. Clicking ok will close Setup and launch Legend Of Mir game.
Installation
Creating account
Installing patch
Download the patch file from 
Double-click on the just downloaded file mir1011b_upgrade.exe. You will se a window like the one shown here. Select Mir installation directory using "Browse" button (by default the directory is set to C:\Program Files\WEMADE Entertainment\Legend Of Mir)
Once decompression is done, you will see this confirmation message. Clicking ok will close Setup and launch Legend Of Mir game.