Hey Nick,

http://www.us.kohler.com/onlinecatal.../1011451_2.pdf

Please refer to page 3 of that pdf.

Pry off the top back cover from the inside of the shower.
Be sure to support the door so it doesn't shatter on the way down.
Have someone on the other side gently remove the top hinge as you loosen
the screws and back plate. That will separate the top hinge from the
glass door. Pivot the door open and lift it off the bottom hinge half.

Be careful!

--Winston