Dragon Age: Origins - Awakening Discussion
I would highly doubt they would update a retired trainer(notice the little red box and the word "RETIRED" next to the trainer) to be compatible with Windows 8.
You could always try launching a Windows 7 iso. When it asks you if you would like to install, click yes. Then after a bit, try the trainer again...
Sadly no there is some altrernitives. In using the console command mod so you can use console commands.
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem