3 - Uncompress the downloaded file into a directory.
4 - On you convertigo project folder, change on build.xml file the value of FLEX_HOME property by the path of your flex builder SDK that you uncompress: Make sure you have a Java environment installed and set environmental variables JAVA_HOME to your Java environment, ANT_HOME to the directory you uncompressed Ant to (ex: ANT_HOME=C:\apache-ant-1.8.2-bin\apache-ant-1.8.2)
5 - Add on path variable system %ANT_HOME%\bin
6 - Create buidFlex.bat and call ant from your project folder (Change WORKSPACE_CONVERTIGO and YOUR_PROJECT by the right value of your evironnement):