[Guide-Outdated] Downgrade 4.5 to 4.0 [Guide-Outdated] Downgrade 4.5 to 4.0

As you may know, NCsoft has updated its client files to 4.5 to include the files with the new class, instances, skills, etc, and while Aion NA remains at the version 4.0, you must have a 4.0 client in order to play in our servers.

How do I know what version is my client?

Check the Version.ini file that is inside the main Aion folder.​

I am a new player, how could I play in this server?

You must download NCsoft's client and then apply this downgrade​

NCsoft launcher link: ftp://ftp.ncsoft.com/aioninstaller/AionInstaller.exe

How can I extract those compressed files?

You must download Winrar, link here: http://www.rarlab.com/rar/wrar510.exe​

How to downgrade:

You will need to download these 3 compressed .rar files, paste them in your Main Aion folder, right click on them and select "Extract here", keep in mind that you must NOT delete anything, just replace all the files with the ones in this guide​

Main downgrade: Mediafire.com - 4shared.com - Mega.co.nz
Map files part 1: Mediafire.com - 4shared.com - Mega.co.nz
Map files part 2: Mediafire.com - 4shared.com - Mega.co.nz

Main Aion folder? These are the most common:

C:\Program Files\NCSoft\Aion
C:\Program Files (x86)\NCSoft\Aion​

If it's not there, and you are sure you've installed it but you don't know where, you can try searching for it using the Windows Search function, you can use as keyword the following files "sc_renew.dat", "Aion.bin", "Version.ini", "system.cfg"

Do I have to download the Map files? COME ON 2 GB!?

Yes, NCsoft changed the structure of those map files to be a bit more compressed, however the 4.0 client needs the 4.0 map files to work so that's why​

Known bugs:

1. Abyss Rank not displaying the Abyss Points Required to be 1-Star Officer and higher, which was kind of useless, that is not the actual rank the servers are following, it follows the actual "Rank" (Left Column). For example; The player with the highest amount of Abyss Points will be the governor and there will be only 1 per faction.
2. While creating a Technist, Aethertech's skills can't be previewed
3. Craft bug like this? Redownload the main downgrade, the fix is inside of it.
4. If you get errors before getting at the Login Screen, download this, move it to the Aion folder, right click > Extract here, and replace everything. Link: Levels

Retail version: 4.5.0.5, still works after applying this downgrade

Feedback is always important, let me know if it worked or didn't for you, client bugs in-game you find, etc