First of all, as I have already stated in my GitHub, do not expect this release app, the full OCR system but it's only my demo at the first sight to answer to my research using Support Vector Machine in 2013 and slightly updated on 2014. Thanks for understanding.
Since I do not commit my time to continue on this topic, I would prefer to publish the demo and soon will make up the source code to public as well.
Currently people are working on TesseractOCR and we are waiting for result, of course some result can be found with the OCR Team at khmerocr.org, please try out and support this team if any.
Here if you're still interesting to see, mine, please download from GitHub: KhmerOCR.NET-App