The lowerdict commit introduced backwards compatibility issues that are addressed by saving the settings in the format 306 expects them - this adds overhead on closing Bash and undue complexity in the code - should be binned but I want 307 out with both settings formats supported so there is a way to support older settings if need be (debugging for instance). This is also an opportunity to make Installer.archive (renamed to iname) into a Path internally - but keep it in pickles as string. -> #543