definitely use the latest version of Mv2 if you're gonna go the Mv2 route ... (has bugfixes etc.)
backup yer stuff, and install from scratch.
The screenshot below shows my /settings folder, that gets created on install. Those files are YAML except MapOptions.cfg, which uses an Mv1 routine.
if you have to convert an Mv1 config to Mv2, well that's on a case by case basis,
(btw, MapTilesets~piratez.yml is (a backup of) a successful conversion from Piratez using the RulesetConverter)