...
FLEXDEPLOY-11236 - Add support for FlexDeploy 8.0+
Only FlexDeploy Installer 1.0.17 or later should be used with FlexDeploy 8.0+ 1.0.17 is also compatible with older FlexDeploy installs and upgrades.
The path of external jars (besides Oracle database driver jars) has changed from FLEXDEPLOY_HOME/apache-tomcat-flexdeploy/libext to FLEXDEPLOY_HOME/apiext.
...