Please let me know if you are able to see a feed from your camera via any other video capture software.
Also, if iCamSource Pro is crashing, there should be crash logs.
The crash logs would be in:
/Library/Logs/DiagnosticReports or /Users/<YourUsername>/Library/Logs/DiagnosticReports
You can get to that directory by running Finder and then holding the Option key while clicking on the "Go" menu at the top of the screen. If you’re holding down the Option key, "Library" will be one of the choices available. You should choose /Library/Logs/CrashReporter/iCamSourcepPro_<date_time>.crash.log. The crash logs should be there.
If you find crash logs, please send the most recent one to support@skjm.com. Also, reference your username and this post in your email.