RE: Z3TA+ Install questions
The Cakewalk promo was oriented to SONAR users, therefore there's only one installer shipped (DXi). However, you can still get both DXi and VST and the standalone version working:
1- Uninstall z3ta+ from the Control Panel
2- Reinstall it using the DXi installer you got. When asked for a folder, please point the installer to your \Vstplugins folder instead of \Program Files... etc.
That should result in both DXi and VSTi operational.