Double click the manual update file from your desktop.
You will be prompted for the location of your current Combat Arms folder. Browse to the correct folder and click Install. The default installation folder is C:\Nexon\Combat Arms
Once the manual update installation is finished, simply start Combat Arms. At this time, the game will check and update itself. This is normal and part of the manual update process.
NOTES:

If you receive an error (canvas.dll is corrupt), please download the new client.
If you receive an error (combatarms.exe not found), please select the correct folder.
The manual update file is for users updating from the last client to our newly released client. If your client is older than that, you will have to download the new client.