I could log to admin but I could not access fronted because that is not Joomla's offline message , and same pass is not working, but anyway here is how you will solve your problem, open css/vmsite-ltr.css find this:
.main-image img.product-image, .featured-view .spacer img, .latest-view .spacer img, .topten-view .spacer img, .recent-view .spacer img {
max-width: 100%;
height: auto;
width: auto;
}
set for example:
max-width: 120px;
or change 120 to what you like.
