Message527

When trying to install Jython 2.1b1, I came to 
the 'Installation Requirements' screen and received a 
message that 'Your Java version is too old'. This 
message is (probably) correct, but there is no clean 
way that I can see to exit from the installer.

The 'Next >>' button is grayed out. The '<< Back' 
button works once to the 'Welcome', but nothing more.

Could perhaps the 'Next >>' button change to an 'EXIT' 
button in this case?

Not an important bug, but it would help add 
a 'cleaner' image to the installer.