Until now, if you are looking to install Titan Icon but don't have a copy of the Issue 24 client, you would need to download the client via Torrent or Sugar Sync. Unfortunately, Sugar Sync has become a paid service, and the Torrent is lacking in seeds; so, there are now two patchers that will download all the files needed to run Titan Icon, and keep them updated as new versions of Icon are released.
Tequila is the patcher for Windows. Because of Windows User Account Control, you should point Tequila to a folder under Documents in order to install the game files and Titan Icon there. If you point it to a folder under Program Files or a drive root, you'll have problems and troubleshooting won't be pretty. The source code for Tequila is available on GitHub as a general purpose patcher; feel free to contribute.Island Rum is the patcher for Mac. This one was developed by Manga, and you should go to that thread in the Titan forums for detailed instructions, or if you need any help setting it up. As Titan Icon updates, so will the patchers. The SaveCOH.com website is due for a redesign soon, and this information will be available in a much tidier format once that happens.