Well here's what i did and it took less effort to get it working.
1. Download the Gameguard.des file
2. Copypasta Gameguard.des inside the Trickster Online & the GameGuard directories *replace the files when asked*
3. Run Trickster and let it update Gameguard.
(Make sure to close all running apps before running Trickster)
Still no fix for Full Screen i believe. >_>