In the grand world of WordPress plugins and themes, 11 months isn’t what I’d call “abandoned.”
Sometimes plugins reach a wonderful stage where they don’t need bug fixes or new features.
Plus, the developer last replied to someone here in this plugin’s support form a bit less than 3 months ago: https://projectdmc.org/support/topic/how-to-get-rid-of-the-year/#post-17881412
They haven’t replied to anything more recent, because that is the most recent thread.
Hi, the plugin’s not abandoned. 🙂
I just havn’t pushed an update because it didn’t need bug fixes or new features and is still working with the most recent versions of WordPress.
I will, however, update the “Tested up to” info ASAP so it’s clear you can still use the plugin in your WordPress projects.