I had the same issue with Monitor 2023.1 upgrading to .2 and had to reinstall everything again from scratch loosing all past metrics. Support was not able to help apart from saying - run a fresh install.
I'm sitting in 2023.2 thinking I'm stuck at this version if I want to keep my past metrics.
Is there a way to save the old metrics and load it when I get the new version .3 installed?