1、使用軟件更新的方式:
打開Eclipse -> Help -> Install New Software 然后在彈出對話框的 Work with 框中輸入如下的地址,回車。
http://update.aptana.com/update/studio/3.2/
然后就會一步步選擇需要安裝的組件即可。
2、在Eclipse 4.2 上安裝 Aptana 3.2遇到的錯誤,提示找不到 org.eclipse.update.ui 0.0.0
通過google(這種時候記得別使用百度),看到有同樣的問題:
http://boards.developerforce.com/t5/General-Development/Trouble-with-Force-com-IDE-installation-in-Eclipse-4-2/m-p/480891#M73687
其中的有人回答:

Re: Trouble with Force.com IDE installation in Eclipse 4.2
08-09-2012 10:06 AM
Update:
In the post I linked above: http://boards.developerforce.com/t5/General-Develo
To Quote Zokito:
Hi,
cause of the problem lies here:
http://www.eclipse.org/eclipse/development/porting
(search for org.eclipse.update.ui)
It should be possible to fetch the deependency automatically through the marketplace but for me it's not working.... so what would you need to do is install the org.eclipse.update.ui manually from e.g.
http://www.java2s.com/Code/Jar/o/Downloadorgeclips
extract it and than copy the jar file to your eclipse/plugins/ directory.
Start Eclipse again and then try to install the Force IDE plugin.
this solved the issue for me
Hope this is helpful!
Kelly