Only the Eclipse SDK comes in a 64-bit flavor for Windows. One solution is to install the Eclipse SDK, and manually install the plugins for Web, XML and Java development.
In order to ensure the Aptana Studio plugin works on a 64-bit version of Eclipse, do the following 1):
JAVA_HOMEenvironment variable is set on your system.
Startmenu search box, and select
Edit environment variables for your account.
JAVA_HOME, pointing to JRE or JDK on your drive, e.g.
PATHuser environment variable. Create a new
PATHvariable if it does not already exists.
xulrunnerdirectory in your Eclipse installation directory (e.g.
C:\eclipse), extract the content of the XulRunner archive in this directory.
eclipse.inifile located in your Eclipse installation directory: