Can you provide more details? Firmware version, plugins loaded, not enabling, crashing launching games, homebrew?
Seeing you have a 2504 slim, you may as well just use cfw honestly. But I am curious what your issue is. You can try using debug mode (from hfw tools -> development -> switch mode) and getting a socat log to see where its crashing.
Could be a hard drive issue, or even overheating, etc. Would need more info.
And as Aldo said, if you are on 4.92, 3.4.0 is your only option for hen.
Edit: you can technically recompile any version from source to use newer firmware, but you are on your own with that, because so many things have changed over the years, it is unsupported to do so. It is open source after all.