Window mode everytime open Warmane Wow

Hi guys, title says it all, everytime i open warmane, it start with window mode, even when i already set full screen. Any help please ?

to avoid confusion, even everytime i change to full screen and log out and exit game, i open back its window mode again

Part 1 - Do if you haven't done this already.
1. Restart your PC.
2. Close and exit torrent client.
3. Move your WoW -folder to other folder, away from Torrent's Download folder.
4. Uninstall torrent client if no further use.

Part 2.
1. Right click WoW -Folder, select properties, un-check "Read-only" and Apply.
2. If you get prompt, Apply changes to this folder, subfolders and files and click OK.

Thank you. It worked.

Great it worked, Thanks bro