1. Right click the NexusTK client and run as administrator
2. Click No when asked to load enexia
3. Now you will be connected to official server and auto patch will begin
4. After the update process is done it will start the patched client again, this time answer Yes then you will be connected to eNexia server, Note on the top left it should be V7.12

OR

You can download the FULL 7.12 client installer from here

https://s3.amazonaws.com/kru-downloads/tk/NexusTK712single.exe

OR

If you already have Nexus installed, but cannot patch, download this file and install it in your Nexus directory.

https://s3.amazonaws.com/kru-downloads/tk/NexusTK710to711update.exe
https://s3.amazonaws.com/kru-downloads/tk/NexusTK711to712update.exe