I believe you will need to contact support to get someone to look at your machine. Since this is a specific issue to you, it probably cannot be resolved here. If possible, you can attach your RuntimeLog.txt with All Categories set to verbose, and I can take a look to see if there is anything obvious, however it sounds to me like an environmental issue if Runtime is crashing with only a windows form in your project.
I was using the application and suddenly it through me out of the application; on checking the event log I find the following:
The program OpenSpan.Runtime.exe version 188.8.131.52 stopped interacting with Windows and was closed. To see if more information about the problem is available, check the problem history in the Action Center control panel.
You would need to make sure that runtime logging is turned on and then examine the Runtimelog.txt to get meaningful information. The event log information is only reporting what you already reported, but does not help to diagnose.
Be sure to enable to FilePublisher. Once done, change All Categories to Verbose. The log file will be generated in %AppDaa%\OpenSpan and called RuntimeLog.txt by default. The UI is slightly different for changing these settings between Runtime and Studio but the changes you make are the same. You do not need to change anything on the tracing tab as that is for advanced diagnostic logging used by our engineers.