Retrograde from Java se6 2015-001 to 2014-001

I installed Java for OS X 2015-001 in order to get Photoshop CS4 to work on Yosemite. But I then found out that I should have installed Java for OS X 2014-001 instead. So I tried to install the 2014 version but it said I can't because a newer version already exists.



How can I get rid of 2015-001 so that I can install 2014-001?



Thanks.