Zen 1.6.5 has just been released, and is now available for x64.
Other changes below:
* Store results of previous plugins scans
* Offer to blacklist any plugins that crashed the previous scan
* Fixed random crashes when deleting a user-defined synth
* Crashes when attempting to load ReaPlugs, or Polyvalens VL1.
* Now uses SQLite 220.127.116.11 and FTS4
As always, Zen can be downloaded here.