Disable that bit of css, then - using Firefox Firebug (or by looking at the page source html) - determine the style ID of your standard date input field. (the one that shows IN ADDITION to the field created by this module).
Then, make the condition of that css apply ONLY to that field.
In MY CASE, that field has the style ID of #attrib-7-0
**
So the css that originally looks like this
/* - - - - DATE PICKER HIDER - - - - /
.wrapperAttribsOptions input {
display:none
}*
is adjusted to be:-
**
/* - - - - DATE PICKER HIDER - - - - /
.wrapperAttribsOptions input#attrib-7-0 {
display:none
}*