I have downloaded the zip file and the source does not compile.
For instance the "DayPilotCalendarProperties.cs" is missing.
Can you fix it?
It looks like the VS 2010 project is outdated. It's now fixed in the code and the fix will be included in the next release.
You can try to open it through the VS 2008 solution (DayPilotLite2008.sln) as a workaround.
Thanks for reporting the problem.