I haven’t responded lately because I hadn’t re-tested, as it’s a bit of a hassle reverting back to a previous version if it doesn’t work. Well, I updated WordPress to 4.2 this morning, updated my themes, then updated my plugins, including the calendar.
The calendar still does not work with the hover feature, at least in Chrome, so I activated the twenty fifteen theme and the hover theme worked fine. Apparently this plugin just doesn’t cooperate well with Themeforest themes, since that seems to be what most of the users here are reporting using.
I guess I’ll go through the process to revert back to 2.1.6.1 which still works with hover. Let us know if you have updates about it working in Themeforest themes again, but I won’t be inclined to keep updating, testing, reporting, and reverting back each time there’s an update that doesn’t specifically address this issue.