FYI
I just downloaded the latest 153 build of tripwire ent app and didn't have any appserver/addons/ in the directory. The documentation states there are addons.
The 2.0 version of the app has a separate TA available here: https://splunkbase.splunk.com/app/3058/
Let me know if you have any issue, I'm happy to help improve the app.
I thought the same, you have to setup the app to get the folders. The doco for this app isnt very good!
Great question.
The technical addon "TA_te" is generated by the installation script in $SPLUNK_HOME/etc/apps/te/appserver/addons
It does not reside in the SPL.