Special characters in your Windows username may prevent the program from starting if the default installation path is used. If the program fails to start then either select a different installation directory in the installer (e.g. C:\Poker\HRC) or alternatively use the plain .zip package linked above.
Depending on your macOS version and security settings you may receive a warning that this application has not been digitally signed.
In this case please follow the instructions linked below:
Open a Mac app from an unidentified developer
These additional steps are only necessary for the first start of the program.