Guild Wars 2

I tried to change my resolution and picked the incorrect one. Now my screen is stuck on Mode Not Supported. Why is my game not going back to choose again? How can I fix this?

what resolution was you trying to pick ??? and the best easy fix I can think of is un stall the game then go to your drive where the guild wars 2 file is delete it and then reinstall the game . hope this helps

Have you tried these suggestions?
https://forum-en.gw2archive.eu/forum/support/support/Clearing-Video-Settings
http://www.guildwars2guru.com/topic/54889-reset-settings/

You could try command line arguments, such as -prefreset or -windowed.

Instructions found in the Wiki by searching ‘Command Line Arguments’.

Good luck.