NppEventExec causes NP crash and leaves remnants after uninstall

[discoverSlow]

A great plugin, in principle.

I changed some rule's regular expression. When executing the rule NPP crashed ("NPP no longer working", I had to kill the process eventually).

Afterwards each NPP restart produces this popup window:

NppEventExec: Error
Failed to read the rules list. The plugin will not function until
the issues are resolved.

It is not possible to resolve anything. A click on Plugins -> NppEventExec

shows all menu entries greyed out.

It does not help to uninstall and re-install the plugin. After re-installation (w/o any other action) the error-popup window shows again and the menu items remain greyed out, making the plugin unusable for any future purpose.

I would expect that uninstalling a plugin leaves no remnants inside NPP.

[chcg]

see https://github.com/notepad-plus-plus/notepad-plus-plus/issues/14731