Which installer are you referring to?
If it is svBuilder, then please try the following and make sure that you have the latest versions of the installation files for both Adobe Air (v3.1) and svBuilder (v2.2.0) before proceeding.
The latest version of Adobe Air can be downloaded from this page: http://get.adobe.com/air/
Please see this page regarding Upgrading SimpleViewer and svBuilder: http://simpleviewer.net/simpleviewer/su … grade.html

(1) Uninstall svBuilder
(2) Uninstall Adobe Air
(3) Delete this folder:
Mac: /Users/your_username/Library/Application Support/Adobe/AIR/svBuilder
Windows (XP): C:\Documents and Settings\your_username\Application Data\Adobe\AIR\ELS\svBuilder
Windows (Vista, Win 7): C:\Users\your_username\AppData\Roaming\Adobe\AIR\ELS\svBuilder
(4) Install Adobe Air v3.1
(5) Install svBuilder v2.2.0

Adobe's 'Troubleshoot Air Installation' pages may also be of help.
Mac: http://kb2.adobe.com/cps/902/cpsid_90205.html
Windows : http://kb2.adobe.com/cps/403/kb403150.html