A slightly newer version of the Zorro MT4 Plugin is available:

http://server.conitec.net/down/ZorroMT4.zip

If you downloaded Zorro 1.10 before May 25th, you'll need this version. Please unzip the ZorroMT4.dll into the MT4 experts\libraries folder AND into the Zorro Plugin folder. Both folders must contain the same DLL!

This version improves the communication speed between Zorro and MT4 and fixes some small issues.