Works fine

Plugin works fine.
Had to tamper with custom CSS to make the code block no-wrap and horizontal-scrollable:

.prettyprint {
  white-space: pre;
  word-wrap: normal;
}
.prettyprint,
pre {
  max-height: 400px;
  overflow: auto;
  padding: 5px;
  width: auto;
}

for some reason, after changing custom CSS, it stopped working with the load JS/CSS in footer option.