This setting controls whether scripts are stopped by aborting their threads externally (abort) or by co-operative checks from the compiled script (co-op)
co-op should be more stable but this option is experimental.
If moving from co-op to abort, existing script DLLs will need to be recompiled.
This currently can only be done manually, either by setting DeleteScriptsOnStartup = true for one run
or by deleting the script DLL* files in bin/ScriptEngines/<region-id>/
One can move from co-op back to abort without recompilation, but reverting back to co-op again will need script recompile