Michael Joseph Wdowiak Beijer wrote:
hmm, perhaps not the most elegant solution, but I just installed Java 8 alongside Java 9, and Heartsome works again.
Yes, Michael, that is a known solution for Java apps: to install a specific version of Java.
To make HS compatible with Java 9, would probably require a massive update of its code and recompilation.
You could also consider to use a virtual machine with the required Java version.
But hey, you’re already fine. Congrats!