I recently installed LiveCycle Designer ES4 (I had an older version before), currently a trial version (waiting for the official license key). Designer is running on VMWare Fusion 7 Pro on a Mac as there is no native Designer version to my knowledge.
Right after installation I was able to use Action Builder from Tools menu. When I opened Designer again, Action Builder was no longer available in the tools menu. Any hints to re-activate would be appreciated.