Feel free to contact the author directly via mail or file an issue on GitHub. Please do not hesitate to contact me in case of any question about the program, to report bugs, or to file any suggestions.
JDigitalSimulator is free of any charge. In case you like the program, feel free drop me a small donation using the PayPal button above, so I can continue to pay the hosting fees. Your support is really appreciated. As a small bonus, please tell me in case you'd like to be mentioned as a supporter in the next release of JDigitalSimulator (in case you are interested please provide your name when donating).