My keyboard shortcuts get reset from "no key" to the default keys, with the debug output "Mi Mai 30 18:45:50 2018 ERROR: YAML Parsing error (shortcut-list): yaml-cpp: error at line 54, column 5: bad conversion". Closing Huggle afterwards removes the possibly broken shortcut entries:
https://en.wikipedia.org/w/index.php?title=User:ToBeFree/huggle.yaml.js&diff=843664516&oldid=843664277
Starting it again works without errors, but all shortcuts have been reset. I can then modify the shortcut list again, close Huggle, and they get written to config:
https://en.wikipedia.org/w/index.php?title=User:ToBeFree/huggle.yaml.js&diff=843664277&oldid=843663739
Restarting then causes the yaml-cpp error to appear again, resetting all shortcuts.
https://en.wikipedia.org/w/index.php?title=User:ToBeFree/huggle.yaml.js&action=history
I have already tried clearing the configuration with Huggle started, to force it to re-write everything on exit. That didn't change the problem.
I will now try clearing the config before starting Huggle, to force a complete reset.