Here are the detailed release notes for the Z3TA+ 2.2 update. 
http://www.cakewalk.com/Support/Knowledge-Base/2007013432/Z3TA-2-2-Update

hey the link isn't working Lance?
 

You beat me to it. I was about to say the same. The link is not working. I would love to know what are the new updates for this VST. 

Z3TA+ 2.2 Update

The information in this article applies to:

• Z3TA+ 2

An updated version, Z3TA+ 2.2, is now available in Cakewalk Command Center for Z3TA+ 2 owners!
Please note: customers who have purchased Z3TA+ 2.2 through Steam will need to update using the Steam client versus Cakewalk Command Center
 
The Z3TA+ 2.2 update includes the following:The latest information on Z3TA+ 2 can be found here. The 2.2 update specifically introduces the following new features:

• Windows 10 and OSX El Capitan Support
• VST3 Support on Windows
• AAX support for ProTools 10+ on Windows and OS X
• Easy Authorization available through Cakewalk Command Center
• 4 Stage Phaser mono and stereo added to modulation effects
• Load FX from another Program
• Bypass button added to Arpeggiator
• Improved Search functionality
  • Search while typing
  • Audition patches within a search without having to reopen
  • Last search is now remembered
• New Sources and Destinations added to the Mod Matrix
  • Sources:
    • Alternate Midi: Alternates 0 1 with midi notes (can be routed to panning to make it go left right etc.)
  • Destinations:
    • LFO Delay (1,2,3,4,5,6,All)
    • ARP Velocity
    • ARP Length
    • Chorus Delay
    • Chorus Feedback
    • Chorus Speed
    • Compressor Ratio
    • Compressor Threshold
    • Delay Feedback (1,2,3)
    • Reverb Dampening
    • Envelope:(1,2,3,4,5,6, Amp)
      • Delay Time
      • Attack Time
      • Decay Time
      • Decay Level
      • Sustain Time
      • Sustain Level
      • Release Time
      • Amount
      • Pitch Envelope:
      • Delay Time
      • Start Level
      • Attack Time
      • Attack Level
      • Decay Time
      • Release Time
      • Release Level
      • Amount

 Bug Fixes:

• Resolved an issue with an expired installer certificate for Z3TA+2.1.1 on OS X
• Resolved an issue with Z3TA+ 2.1.1 crashing Garageband X when trying to register
• Resolved an issue where toggling the Keyboard (Preview Ribbon) would crash StudioOne
• Resolved an issue where the +/- on the Keyboard with Z3TA+ 2 in focus could cause SONAR to crash
• Resolved an issue where unwanted panning could occur in Z3TA+ 2.1 when left to loop over a long period of time
• Resolved an issue where MIDI Learn did not work for Waveshaper parameters
• Resolved an issue where Drag import MIDI to Arp did not work in some situations
• Resolved an issue where Preset Inc/Dec and Random did not MIDI learn correctly on Windows
• The Microhost now has a Sample Rate selector on the UI
• Removed the unintended "Audio Input" control from the mod matrix
• Resolved an issue where exporting a MIDI file from Z3TA+2 arp, and re-importing the MIDI file results in +1 Octave
• Resolved an issue reported where Z3TA+ 2.1 would not not automate waveshaper parameters with host-synchronized LFO (CWBRN-8874)
• Resolved an issue where text for modulation parameters was being cut off in master display
• Resolved an issue where the Preset name would displays a GUI glitch when searching and selecting a preset
• Resolved an issue where the Search box was visible on credits/signal flow screen if no text is entered
• Resolved an issue where clicking extreme-left of Shaper would flip it
• Resolved an issue where meters and poly count jump thru about page GUI
• Resolved a patch specific issue (Showcase) Bass Shape 01 FS Delay 1 where it would become non functional
• Resolved an issue where Waveshaper controls behave differently on User waves
• Resolved an issue where the mod matrix could becomes unresponsive
• Resolved an issue where Sync on Modulation was inconsistent when triggering vs played back in SONAR
• Resolved an issue where CC# 43 displays as 33 in right-click menu when mapping parameters
• Resolved an issue where the Stereo Chorus was not processing as true stereo chorus
• Resolved a potential memory leak/potential crash when using the random program picker
• Updated many buttons to have proper tooltips
• Resolved an issue where the Z3TA+ Microhost menus did not behave as expected when using Record WAV File
• Improved responsiveness with controls, such as Filter Link and Control Previews, which were lagging in OSX
• Resolved an issue when choosing some program names that displayed unrelated "Parameter 659:" tooltip

 
How to Download and Authorize the Z3TA+ 2.2 UpdateDownload and Launch Cakewalk Command Center. Please note that Cakewalk Command Center versions 1.1.2 (Windows) and 1.1.51 (OS X) are now available. Please make sure you are running the latest update if you aren't already.
Locate Z3TA+ 2 under Connected Products. Select it from the list on the left, and then click [Install]
Authorization is handled automatically by installing Cakewalk Command Center to your computer and running the Z3TA+ 2.2 installation.
 
 
This article was last updated on 11/25/2015

doriginal
You beat me to it. I was about to say the same. The link is not working. I would love to know what are the new updates for this VST. 

Good catch :)

Thankyou!

I have noted two things:
 
* Firstly, the updated Z3TA+2 is now available through CCC, even though I bought it through Steam. This is a good thing, nice to get out of the Steam system for it. Hoping that doesn't change. (Hope I haven't shot myself in the foot for this post).
* Secondly someone else has reported that now Z3TA+2  shows up as VST3 instrument only, so all their existing session files no longer load correctly. I haven't able to find reference to this anywhere else.

I'm that someone else.  I even tried unchecking the "Hide VST2" and the "Replace VST2 when loading projects" options to see if that would resolve, and so far, no luck.  I can, however, go through my songs and "reselect" the proper sounds, but I use Zeta 2 on a LOT of tracks, and I can't possibly remember the sounds I used on all of them.  Unfortunately, at this time, I have had to uninstall and revert back to Zeta 2 v2.1

phlosten
* Secondly someone else has reported that now Z3TA+2  shows up as VST3 instrument only, so all their existing session files no longer load correctly. I haven't able to find reference to this anywhere else.

It doesn't matter VST3 or VST2, but it doesn't load program data in old sessions. Rolled back.

VST 2 and 3 installed for me. Those who are having problems with this I suggest they check the VST file path in Sonar preferences and CCC. Then if necessary reinstall z3ta+2, but before you do that make sure verbose mode is ticked in CCC settings..