ApexPC:
The WGT game client Game Settings/Options are recorded in small files - cookies - that are stored on your computer.
You might want to check the settings for how your browser handles cookies on your computer when your browser is closed.
I know this, dear knight. I have not activated any "delete cookies" action. If so, all game settings would be purged which is not the case.
You might also want to check my writing on the phrase "during continuous browser operation" which means that the browser was not closed, I repeat, NOT CLOSED in between. Only the game window was closed and re-opened while another browser window remained open, cookies and cache were not deleted.
I suspect that the information "SOUND OFF" isn't stored at all any more - would you kindly consider to test it yourself?