Until the problem is resolved you could edit the skin files in an external text editor, use Menu>Tools>Open directories>Skin directory or keyboard shortcut SHIFT + Cntrl + S to open the skin directory in your OS file system.
Thanks for testing with Java 8 too. I've examined these crash dumps again (the Java 9 and Java 8 one). The crash occurs when interacting with the printing system. Here's the key line:
I assume that some configuration in your printer setup causes this crash within Java. It could naturally be a bug in Java, but we've reported it already. Try uninstalling and reinstalling your printer driver as a test.