I just downloaded Dragon Ruby Version 154 and ran 00_learn_ruby_optional when the engine window freezed.
I was able to close de console that opens with the engine but not the engine main window.
In the task manager, DragonRuby is rogging resources, the memory usage keeps growing:
System info:
Windows 11 Pro 22H2 22621.2134
AMD Ryzen 7 5700X
NVIDIA 3070
RAM 32,0 GB