Many thanks to MAF for the updated trainer, and to masterrelius91 for pointing out how to get around the loading screen freezing issue when trying to craft grandmaster armour. I found however that after getting him to craft the armour, I had to take one additional step than the steps outlined by masterrelius91 earlier, that is to close the trainer after I had crafted the armour but before exiting the conversation with the grandmaster.
I now have a question about unlocking the four new ability slots after completing the Turn and Face the Strange quest. Using the easy craft cheat on this trainer, I've since proceeded to create the mutagens necessary in order to unlock the twelve Strengthened Synapses mutations, and I have enough ability points to unlock all twelve. However, after I have researched all twelve of the mutations, only 3 out of the 4 ability slots were unlocked, and one slot remains locked. According to a guide I found online (
http://www.pushsquare.com/news/2016/06/guide_the_witcher_3_blood_and_wine_mutation_character_builds), all four ability slots would be unlocked once the 12 mutations have been researched. Despite many attempts I have not been able to unlock the last slot.
Has anyone encountered this problem, and if so, have you managed to resolve it? Thanks in advance.
Edit: I am running the game on GOG Galaxy on Windows 10. I have tried running the game from the .exe file and from the GOG Client, and have not observed any appreciable difference where this problem is concerned.