Trouble finding path

I installed appjetty’s DYNAMIC LOGIN SCREEN last week and really do like the looks of it. However, I have a minor issue that I can not seem to resolve.
Our company logo is too small on the log in screen. I see where the problem lies.

The code seems to indicate a size change…
Company Logo

However, I cannot find where that code resides? I’ve looked everywhere.

I’ve attached a screen shot.
I’m sure it’s obvious.
Thanks for any help you might can offer.