Version 4 was released on February 1, 2004.  It can be downloaded from the ACE Download page.  To upgrade, simply install to the same folder as your current ACE Server.  The installation will not overwrite any of your existing scripts or config files.  However, you may want to back them up just to be safe.

What's new in Version 4:

• See the version history file for a complete list and for more details on each item below.
• Plugin support that allows users to add their own API commands.  New commands can be added by writing a script or by creating an ActiveX EXE.  The Developers page includes a sample VB6 program that you can use as a start for your plugin. 
• Weeder DIO board support
• I/O port support (read/write the parallel port and other ports on I/O boards) - works on NT, 2000, XP too!
• Various bug fixes
• YAC support
  • Display caller id info and/or any message on TiVo
  • Share your TAPI modem so you can get caller id info and use it for other things
  • YAC can run on a different pc than ACE Server and send the caller id info to ACE across the network
• Change volume and un-mute pc sound card while announcing callers
• CallSoft support (new API commands added, caller id support, still enhancing this feature)
• Slinke support (new API commands added, can send X-10 commands using a CM11A)
• HomeSeer ver 1.6 support (new API commands and HS plug-in also available)
• Ability to target multiple clients with 1 API command (see the new header ACECL: in the version history file)
• Support for Comfort CCL files
• Ability to run a script when any message is received from HomeVision
• Ability to run a script when any message is received on any serial port (message is passed to script so you can write your own custom event logic for any serial device)
• Ability to accept/reject client connections based on the client's MAC address and/or password
• Enhanced info available for each connected client (pc name, client id, MAC, etc.)
• Completely redesigned COM interface.  Hopefully it will now be able to work consistently when started from other programs, such as IIS and ASP pages.  This has net yet been fully tested.
• Much more...