We are very sorry that you are having these issues. The unknown error is a rare problem that can be caused by specific variable or broadcast event names. We have identified and correctly all known cases that can cause this, and we are currently working on improving the error programming message to alert the user exactly what the issue is. We value your feedback on this item to help us identify and correct any problems that may have occurred.
Regarding double-clicking, this is only a known problem when loading a program from the Browse menu. Modkit is designed as a web application, so like all web sites double-clicking on links will cause web pages to load twice. In rare instances this may cause the program in Modkit to fail to load properly. We are currently working on eliminating this potential issue.
To help provide you with additional help and example programs, please send the .mkc file of the Modkit program in question and a description of the problem that you are having issues with to firstname.lastname@example.org. You can download the .mkc file in Modkit by going to the Project drop down menu then select Download.
For example programs, we are still wrapping up all documentation. If you have any specific questions or would like to see how a specific block is used in a sample program, please contact email@example.com.