[Wine] Resetting DPI

[mkiwi]

How do I set the screen DPI back to 96?
.
 I have looked at FAQ but the answer given is for computer literate users and means nothing to me. 

How do you find thew Wine directory and delete it as suggested?

Could some one guide me through the steps please.

So far I have uninstalled Wine and re-installed 3 times but the large DPI persists and I need to reset it to 96 DPI some how.