If the language reverts back to Chinese but to manually edit it open the Expresii folder here:

	%localappdata%

Now open the Expresii x## folder, open the Config folder, inside is a file called X.CFG. Open this and look for:

	UILanguage=1

Change this to:

	UILanguage=0

Or the language you chose (the menu that opens on 1st start just count down where the language you used is so Eng is 0, Chinese is 1 and so on)

Or just delete the Config folder completely. Either way works