Guild Wars 2

Every time I start the game client, graphics settings “Ambient Occlusion” and “High-Res Character textures” reset to unchecked.

You could try clearing your GW2 cache, as it may have become corrupted.

Instructions found in the Knowledge Base accessed via the ‘Support’ link above/below and ‘Search – Troubleshoot Trading Post’.

And/or try deleting your local.dat file: https://help.guildwars2.com/hc/en-us/articles/201863008-Repairing-the-Game-Client

Good luck.