Install directory still defaults to C:\Perl64 instead of the set C:\prg\Perl64

I used http://downloads.activestate.com/ActivePerl/releases/5.20.2.2001/ActiveP... installation package on Windows 7 64bit and changed the install directory from the default C:\Perl64 to C:\prg\Perl64. The installer, however, still installs to the c:\Perl64 directory.

When it comes to display the release note it cannot open it at C:\prg\Perl64\html\release.html, the error message is:

[ (X) C:\prg\Perl64\html\release.html]
(X) Windows cannot find 'C:\prg\Perl64\html\release.html'. Make sure you typed the name correctly, and then try again.
[OK]

The directory C:\prg\Perl64 is not even created, instead C:\Perl64 is used.